STFC-RAL-CR03 R61: Thank you very much for the introduction.
STFC-RAL-CR03 R61: Thank you very much for the invitation, providing with the opportunity to, to, today how Gaia might, help, in understanding, that, the role of that matter.
STFC-RAL-CR03 R61: I listed here my strategic collaborators in this project.
STFC-RAL-CR03 R61: Many of them are my… was my, tutor, what was your tutor, and now they're also inside my student, so…
STFC-RAL-CR03 R61: And it's quite mixed at age.
STFC-RAL-CR03 R61: Now, my talk today, I will…
STFC-RAL-CR03 R61: Try to, show you some… to explain some of the ground.
STFC-RAL-CR03 R61: why use generativity now for astrometry, and today we are in the domain of relativistical gravitational astrometry, and how we can challenge the graphic models with limited waste hours, specifically using our mic equivalent
STFC-RAL-CR03 R61: laboratory, so the closest cosmological product at zero rate shift, and I will present you with a test on general activity in nuclear screen, and in particular, how we can interpret dark matter with general activity in such a scenario.
STFC-RAL-CR03 R61: Let me say, to ambulances.
STFC-RAL-CR03 R61: I mean, gravity, everyone knows gravity is, it's not just a force, it's a become itself, and this is reality when we look at the evolution of the stars.
STFC-RAL-CR03 R61: And also, gravity, ruins our universe, so… and in particular, it's, create a distribution of distances and velocities.
STFC-RAL-CR03 R61: In the near and far universe.
STFC-RAL-CR03 R61: And both of these are, characteristic, peculiar characteristics of the Gaia satellite.
STFC-RAL-CR03 R61: Gaia was launched in 2013.
STFC-RAL-CR03 R61: and mapped from them to all the, herd, Can I seek profile?
STFC-RAL-CR03 R61: Yeah, peace.
STFC-RAL-CR03 R61: from the airflow point, solar expansion point of the, solar Earth system.
STFC-RAL-CR03 R61: It marked all the sky, as you can see here, because he was endorbed with a spin, rotation, microsar section, at fixed angle to the sun in order to guarantee gas coverage.
STFC-RAL-CR03 R61: And, in America, the most 2 billion object, we did in Oculus is 1 microsecond.
STFC-RAL-CR03 R61: What's markup cycle, is, it gets a huge accuracy. It's like to see the tip of the mole. The mole that is the perfect building in Turin, which is a star with a star, and you see the size of this star from Jupiter.
STFC-RAL-CR03 R61: So it's very huge angles. As a matter of fact, astronometry is a very old branch of astronomy.
STFC-RAL-CR03 R61: dedicated always to this fundamental question, where is our place in the universe. And basically, it collects photons, it measures angles, collects photons received over time from,
STFC-RAL-CR03 R61: From all sorts of celestial sources, the observers, and from measuring angles, able to understand the position and movement of the stars.
STFC-RAL-CR03 R61: So the accuracy was increased between the ages. The first astrometric mission, Space Force Partos, launched in 1989, and the Garrio was the second space mission.
STFC-RAL-CR03 R61: And basically, for a part of the accuracy, was 1 millifseconds, and the location, an object in astronomy is, considerably variable if the relative arrow is less than 10%. So if we have, for example, relative on milliac second, we get 10 minus 3 arts second.
STFC-RAL-CR03 R61: With Gaia, we have a…
STFC-RAL-CR03 R61: The accuracy, nominal accuracy of 10 microseconds. That means that we are able to reach the galactic scale here.
STFC-RAL-CR03 R61: So, this is the size of the particles mission. With Gaia, we enlarged our… the… the investigation of the Milky Way up to the galactic scale, 10 kiloparsecs. Basically, we did… we…
STFC-RAL-CR03 R61: We make the standard parallax measurement, but of course, with the smaller angles, smaller and smaller angles.
STFC-RAL-CR03 R61: And that, gaia, so one of the main, festival of Gaia.
STFC-RAL-CR03 R61: Is that collect? It needs a focal has collected, he needs a focal claim.
STFC-RAL-CR03 R61: The treatment of medical imaging are still ongoing. Astronomy for the position, for promotion, and parallaxes.
STFC-RAL-CR03 R61: photometry for the spectral classification, for brightness, temperature to mass age, and spectrometry for radial velocity, chemical abundances, and so on. So the main goal is to map almost a billion objects, but also to classify them, to carefully classify each individual object.
STFC-RAL-CR03 R61: According to their characteristics, for example, position, velocity, price, and temperature, composition, and time.
STFC-RAL-CR03 R61: And, employees produce signs,
STFC-RAL-CR03 R61: to understand, in order… the main goal is to understand the region, the structure of the evolution of the Milky Way, as well as to study to make some test of fundamental physics of the solar system at upscale the Milky Way. Here you can see the…
STFC-RAL-CR03 R61: the last maps for Mr. Tagaya. The top of that, you see the total brightness color of star observer with the last layer that release. The middle is the star density map, and the third one is interesting, that's the distinction in the Milky Way.
STFC-RAL-CR03 R61: Gaia now has been facilitated. It lasted 10 years. The nominal, like, the mission was 5 years, but, we extended that 2025. Actually, it was facilitated just because it was exhausted and prevalent.
STFC-RAL-CR03 R61: And, now, now, it's a column made the guy made more than 3 trillion observations of two billion star augmented object.
STFC-RAL-CR03 R61: This guy is the factory mission, so you look at the factory inside our Milky Way, but as well as, you know, also outside of the galaxy, object outside of the galaxy.
STFC-RAL-CR03 R61: For example, this slide shows you the improvement of Gaia. This is supposed to produce a stellar density map for producing after, 40 months of Gaia routine equals delta Gaia, this one, and you can see here the artifacts produced by, essentially, by the… the…
STFC-RAL-CR03 R61: the motion of Gaia, the scan of Gaia, that this was not covered the area of the sky, so this is… you can see some face of the… especially the beast of Gaia. Of course, there is some…
STFC-RAL-CR03 R61: And the artifact is the fact that at that time, Guy was not accumulated many observations.
STFC-RAL-CR03 R61: For example, this is, with the second Gaia that release, you can see the improvement of the raster diagram, or the vision of the star. This is comparing what I'm observed… we observe with the focus with several after this.
STFC-RAL-CR03 R61: with ILDR2, so we populated all the, the ISHRDM, also with, for example, objects like white dwarf, and, so there's a lot, a huge improvement with that.
STFC-RAL-CR03 R61: And also, of course, with the last guy that readily, so now we can see the density stellar map has been covered again, and we are able to see to spot also satellite galaxies in the gala.
STFC-RAL-CR03 R61: This is the number of the last government released, which comprises 1.1 billion stars amongst the star, 33 million, with determining also the regular velocity, the distance, the distance of this object.
STFC-RAL-CR03 R61: spectroscopy. Of course, this is not the end. More has to come with the next Gaia that release.
STFC-RAL-CR03 R61: DR4, for example, is expected the end of 2006. From this guy adopted release, we will have
STFC-RAL-CR03 R61: Glastometric, photometric radial velocity cover, all an exoplan lists, all the classification of single, non-simple stars, and so on, but most of all, all epochromitromacy, that data for all the sources.
STFC-RAL-CR03 R61: And the last one release will be the 5, which will be at the end of 2030, and will be, the final of the…
STFC-RAL-CR03 R61: the last archive has all the five years of 10 years' observation of Gaia, and is an important legacy archive for all the data for the decades of a summer, so about 50… I think, mostly through the 50 years, just Gaia.
STFC-RAL-CR03 R61: But it's a really attractive.
STFC-RAL-CR03 R61: And, okay, Gaia, is looking inside our galaxy stars, many stars planets, the moon, but Gaia as well is very… we have got to detect many asteroids inside our, our solar system.
STFC-RAL-CR03 R61: classify the 56,000 asteroids. Even… you are able to determine the color, the brightness, even the moon of some asteroids.
STFC-RAL-CR03 R61: But since Gala is also my mission, you, we have, now we have served also 2 billion, external galaxies, and, and most of all, now we have two, 2 billion, quasar, quite, the very distant, galaxies, but now we have, 5,000, 5 million, quasar, quasar candidates.
STFC-RAL-CR03 R61: Okay, this is the number. I'll just show you quickly the number of, of Gaia, that, that are released, data release.
STFC-RAL-CR03 R61: Bye.
STFC-RAL-CR03 R61: As I said before, nowadays, we have a bridge eye to move from classical astronometry, so the astronometrists measure always angles in the sky, but we have to move from classic astronometry to,
STFC-RAL-CR03 R61: to general activity. The reason is this spot, and this plot, you can see the Gaia sky at L2. We have removed the effect of the sun here. This is the position of the planet. The deflected light produced by the planet of the solar system. They are, of course, they are moving, always moving, they are not stationary, so this is a… and this is a microsecond accuracy of Gaia.
STFC-RAL-CR03 R61: definition.
STFC-RAL-CR03 R61: of the Gaia measurements. So, we have to take into account the suspect, general activity.
STFC-RAL-CR03 R61: even of the planet produced some deflection inside the Gaia measurement, so we had to move at the angle, not any more than straight line. Beating straight line might have been, geodesic, deep in Jastic Planet.
STFC-RAL-CR03 R61: Okay, so this map, a stellar density map, as modern fact, is produced by integrating 2 million larger densities, by using general activity. That is not an emerging satellite that produces images. We reconstruct the Milky Way through measuring the angles.
STFC-RAL-CR03 R61: Then, basically, as being reconstructed by considering the, solution for osolar systems, which is our, this is the solution, the metric of oursalac system, basically. Maybe you can see here that you have a
STFC-RAL-CR03 R61: this off-diagonal term, this one, which depends on the velocity of the planet of the solar system, the ball inside the solar system, so-called gravitomagnetic effect, which will produce current mass. Okay, this is a… this is… we have to keep this term, because this time is at the border of 1 microsecond, if you consider the legal theory, or a bound system, like our solar system.
STFC-RAL-CR03 R61: So, this is also the metric that is used for the definition of an international terrestrial reference system, which all the astronomers use this fundamental
STFC-RAL-CR03 R61: reference system.
STFC-RAL-CR03 R61: And, it is used to describe the female, but also to reconstruct the light fabrication. For example, here you can see in this, this table that we have… the sun is, of course, predominant in all the solar system.
STFC-RAL-CR03 R61: Yeah, Svelomia?
STFC-RAL-CR03 R61: But also, Jupiter, we have to take… this is the… this is the threshold accuracy of a markup second, so we have to take into account the Sun and Jupiter in Saturn, and of course, other… this is for the static part, for the monopole component of the mass. So, of course, if you are considering the velocity, the quadruple part, we have to, of course, take into account also this… this effect.
STFC-RAL-CR03 R61: So this is unvoadable for GAI to consider general activity at the core of this, data analysis.
STFC-RAL-CR03 R61: Another fundamental physics task of Gaia is to reconstruct an optical band, or the reference frame. Since so far, there was… we've used… some user manual, radio sources for a certain… in order to define a quasi-inertial reference frame in the sky.
STFC-RAL-CR03 R61: But with Gaia, we were able to connect, to link the optical, as I say, with RAVIO, but also to make a large improvement in terms of the number of sources, so we have…
STFC-RAL-CR03 R61: about 4 million sources, like we assume. So this is very important, because we are going to consider global astronometry.
STFC-RAL-CR03 R61: So it means that we are reconstructing our sphere by considering all the angle between stars, but of course, there is always… we have to fix some of the genesis due to the rotation of, for example, the satellite.
STFC-RAL-CR03 R61: by considering some, the reference for the quasa as, as the faraway source, the onshore, for the time of the movement in the universe. But, of course, the, the quasa for us will be, zero proper motion, and for this reason, that's good, anchor to define the…
STFC-RAL-CR03 R61: the… the movement here of the universe, right? Of course, this is… since as this…
STFC-RAL-CR03 R61: We introduced for the first time with Gaia General Activity, the Consortium possibility for the Gaia,
STFC-RAL-CR03 R61: agreed to set up, respectively, two different groups for a reconstruction.
STFC-RAL-CR03 R61: two dependent models. One is a brand daily model, the other RAM model-activistic astrometry model. RAM model, in particular, is implemented in one… in a data center that we have interviewed. It's, the six… one of the six data centers across Europe, dedicated just to the astromatic identification.
STFC-RAL-CR03 R61: I may skip this slide, just the different framework around what is based on the protocol measurement of general relativity. It's considered everything inside in the generalistic framework.
STFC-RAL-CR03 R61: So, and the other model tried to stay close as much as possible to the classical astronomy.
STFC-RAL-CR03 R61: So the Starlight is reconstructed by 7 approximations.
STFC-RAL-CR03 R61: And, it's defined in, in the terrestrial territory system coordinate system. The basic difference between two approaches, you can see here that this is the coordinate the direction, this is the coordinate catalog, with the,
STFC-RAL-CR03 R61: When you use general nativity, we have to define a proper observer, proper geometry, and just you can see the difference. You naturally produce an aberration due to gravity to the local field, for example, at the sun and point, this is already 100 microseconds.
STFC-RAL-CR03 R61: Basically, the protocol management said that once you have
STFC-RAL-CR03 R61: and no server, you can always split the background geometry of the server with the two operators that help you to measure… make some measurement time in space. This is a basic principle that we use. Of course, because curvature is everywhere, you have to define a measurement with respect to some observe, to some kinematic background, to some… with respect to some geometry.
STFC-RAL-CR03 R61: As far as Gaia is concerned, of course, we have a
STFC-RAL-CR03 R61: Here, visa. This is a measurement, the angle of the direction of the lie, as projected on the local vaccine work observer.
STFC-RAL-CR03 R61: With respect to the aptitude of the satellite light, the aptitude should be defined in general relativity, or should be consistent.
STFC-RAL-CR03 R61: And, this is your measurement in the focal plane that you compare this data, that you compare with the theoretical model here. Then, of course, this is, you repeat this observation for each star, for each observation, to three observation directions.
STFC-RAL-CR03 R61: And we have a huge, system of equations, observation equation, that you can solve. Once you solve, you have the… you solve for, with respect to unknown, so maybe parameter, the aptitude parameters, or global parameter. Then, from here, you deduce the position and the motion… the motion of the stars.
STFC-RAL-CR03 R61: So it's a huge jump.
STFC-RAL-CR03 R61: calculations, I don't want to enter the table this far.
STFC-RAL-CR03 R61: When do we featured every, every possible? Of course, all of them.
STFC-RAL-CR03 R61: In any direction, every time you, recreate a somatic sphere, a vertical structure.
STFC-RAL-CR03 R61: Now, one of the global parameters here, as you see, is the gamma parameter, which in general activity can measure how unique mass curve at space-time, or general activity is 1.
STFC-RAL-CR03 R61: But for some scholar-tensive theory, for example, for the predict, the de la Tome.
STFC-RAL-CR03 R61: There should be a difference from the one where you predicted by GR at the level 10 to minus 6. So, we… we started, when we… we started with Gaia, we thought it was possible with Gaia with 2 billion direction observed. It's a huge statistic, as a matter of fact, in this guy.
STFC-RAL-CR03 R61: to detect this bank gamma, to improve also this. But unfortunately, there is some problem in parallel sheet, Gaiah, so that we have to wait for next Gaia, or we need to improve… maybe with the DR5, we are able to improve this diagnosis determination gamma that
STFC-RAL-CR03 R61: at least will be, as the Cassini, the value Cassini experiment that was about to attempt to multiply the deviation from…
STFC-RAL-CR03 R61: Now, let's move to, to local cosmology, and then we can see Gaia to, as the laboratory for the Palampassia and Mepata.
STFC-RAL-CR03 R61: So this is called a brightness map of the Gaia. So we… with Gaia, we were able to chart the 6th dimensional phase space
STFC-RAL-CR03 R61: up to kilopar systems. That means, since the precision of the classification Sky is able to detect individual with such precision individual cells, we are able to probably liquidation protection and search for signature cosmic evolution.
STFC-RAL-CR03 R61: For this reason, we move from relativistic astrometry, which is to implement model for data analysis, to gravitational astronometry, which means to impact. So, of this, the effect of the gravity of photons and all the scale from the solar system in the Gilky Way.
STFC-RAL-CR03 R61: Which, of course, comprises also, to understand the formation scenarios in these stellar e-planetary formations.
STFC-RAL-CR03 R61: For this reason, we call it this local cosmology, because our Milky Way can be referenced and played as the sun, as much as the sun for the stellar Revolution.
STFC-RAL-CR03 R61: And also, that can provide, also, by, constraint to some, model parameters, especially in cosmical, in cosmological relations.
STFC-RAL-CR03 R61: I don't want to… everyone knows, here, I think… I think this audience around the CDN liability.
STFC-RAL-CR03 R61: So these, the, the, the, there'll be…
STFC-RAL-CR03 R61: The absence of evidence of extra matter, the need of that matter, on this,
STFC-RAL-CR03 R61: in this case, intensive glassy cluster, larger structure and megaparsal scale, cosmic and break ground, gravitational landscape, rotational curve, and galactic scale. Of course, there are many candidates, but one point is that, for example, in cosmological simulations.
STFC-RAL-CR03 R61: it's likely that Friedman tells this how to curve, and Newton tells us how to move, in the sense that they use the
STFC-RAL-CR03 R61: solution-wise equation, the Friedman, Lameter rotational worker metric, but when you go at the scale of the growing structure in small scale, you… they use that as a matter of a Newtonian,
STFC-RAL-CR03 R61: gravity internal, so it's not going anymore generativity. In the recent years, there are many efforts to include this cosmological simulator in this geolvolution, for example, the galaxies.
STFC-RAL-CR03 R61: Now, how galaxy? I want to know that our galaxy is made by a different component.
STFC-RAL-CR03 R61: For the barge bar, and it is the spiral arms. We have the Star Harlow, and also the satellite galaxy. In the disk, we can find a crit on board with this star, or we… we can check and follow if there are crit satellites that hit these stars.
STFC-RAL-CR03 R61: But the Milky Way is based fundamentally on the long CDM miraculous scenario, so it's a bottom-up process, so we expect to find in our
STFC-RAL-CR03 R61: galaxies met mergers, due to the, the small, the howl, so the sub-Hull of that format that contributed to merger, to form a galaxy. And this is the open question we see today, so online mergers in the history of the Milky Way, how large there, where did the merger take place, the merger affected the Milky Way?
STFC-RAL-CR03 R61: Thanks to Gaia, now we know, for example, that when we focus on the hull, we know, for example, that we observe this Gaia surge, so a major, major. This is mostly perpendicularly fall in the center of the galaxies, we can see this from considering them.
STFC-RAL-CR03 R61: classification of this object, we can see this for, for the external source galaxy, and that with respect to even comparing the…
STFC-RAL-CR03 R61: the metallicity of the start, with respect to the start that belongs to the fall that… more must see that this marginal cloud, this small marginal cloud, so it's not like the paradigm that we have with, many mergers, small mergers.
STFC-RAL-CR03 R61: We know also that our halo can be formed by tidal contribution. For example, we have observed that the recent passage of the Sagittarius dwarf galaxy
STFC-RAL-CR03 R61: announce the star formation, and we can see this. That is not… apparently, it's not even related to dark matter in this case, just gravity.
STFC-RAL-CR03 R61: Then we are able to count the substructure that we observe in Halo. This is the former Jagam nature. This is the limit for the disc star. You can see that the
STFC-RAL-CR03 R61: The radiograph star network don't belong to a galaxy, stars are the stars that are
STFC-RAL-CR03 R61: control of the galactic rotation.
STFC-RAL-CR03 R61: So we can… we have… this is the guy in Saladus, but we are able to count many other substructure. But the main project that,
STFC-RAL-CR03 R61: This cosmological simulation predicts many merger, many, many substructures. We… we… so far, we've been observed so many mergers, so many substructures, so a few of these substructures. Maybe with the next data release, maybe without, also with new facilities and ground new space, maybe we're able to detect more of this substructure.
STFC-RAL-CR03 R61: And, of course, the detection is abstract, it's very difficult, especially for example, in the case of ECOMS, which is a merger that comes parallel to the galactic plane, so it's inside the galactic plane. It's very difficult to do the time.
STFC-RAL-CR03 R61: It's the origin of this, of this, for example, this, this substructure.
STFC-RAL-CR03 R61: M.
STFC-RAL-CR03 R61: Then we know also that our galaxies is a war, but there is a war.
STFC-RAL-CR03 R61: And,
STFC-RAL-CR03 R61: And then the work, is, processing much more faster than predicted, so, and it was predicted by considering the no spherical halo, the tidal contributions they are, from the tidal contribution of other galaxies.
STFC-RAL-CR03 R61: Now, and then we have, of course, the, the rotation curve of galaxies that, is, that you need, and how long in order to fit the flatness of the observed rotation curve.
STFC-RAL-CR03 R61: So, now, this guy, yeah.
STFC-RAL-CR03 R61: is, observing a very, periodically, he's producing pretelistic kinematics in order to, to check the first part of local cosmology to check if,
STFC-RAL-CR03 R61: Milky Way can be, I'm just saying, why, generalistic can be described by general activities to use the, the rotation called the Milky Way for JR Galaxy.
STFC-RAL-CR03 R61: Ugh.
STFC-RAL-CR03 R61: Yes, because Gaia, in order to guarantee scientific products, this multi-length vision of our galaxy.
STFC-RAL-CR03 R61: We need to use generativity. So, any interpretation of the way should be consistent with the theory underlined in the nice process data, at least a fundamental step. We cannot neglect. We cannot use generativity in an ISO data and then move on to reconstruct or improve it. It could be inconsistent.
STFC-RAL-CR03 R61: But usually, in the weak field regimen, the mucus here.
STFC-RAL-CR03 R61: is considered valid, since one assumes that the gravitational potential for characteristic effect, are usually smaller than negligible, and the Newton approximation of the general activity is valued locally.
STFC-RAL-CR03 R61: But we have to consider the same reason that we have mentioned with the Gaia, when we have to consider reconstruct the light from inside the solar system, and we have to consider also the off-dominant term of the matrix, because it's all over the microseconds.
STFC-RAL-CR03 R61: If we suppose this is a poster Newtonian approximation of the solar system, of our Eisen equation of the solar system, if you think to some poster Newtonian approximation of the solution of the Eisen equation in the Milky Way, we can see that, for example, at B over C order, when we put galactic velocity, this is the order of 10 to 100 micro cycle.
STFC-RAL-CR03 R61: So, it's, it's larger than the individual astrometric element. So, we should be very careful when we consider, weak, weak with respect to what. So, the…
STFC-RAL-CR03 R61: And this was not possible before, because we need… we didn't have the accuracy of Gamia. So, to make a visa set for, for,
STFC-RAL-CR03 R61: And, okay, so we have to check it. We currently see the physical elements.
STFC-RAL-CR03 R61: And also to be aware that the small corporate limit in general, it may not coincide with the Newtonian regime.
STFC-RAL-CR03 R61: So, in order to, to keep, to understand what we produce, if there is something new that we have to introduce, of course, we have to keep also the comparison, of the general EC model with the classical one.
STFC-RAL-CR03 R61: This is the same that was done… I will just mention this item in the past, so,
STFC-RAL-CR03 R61: We… when we were looking for it, natural was,
STFC-RAL-CR03 R61: was considered that planet in orbit of Rhanus. Actually, it was… it was, found, exactly where it was predicted by Winter theory.
STFC-RAL-CR03 R61: Following the success of detection of Neptune, when we tried to understand the excess of the periodic shift in Mercury, they hypothesize a volcano planet.
STFC-RAL-CR03 R61: But actually, it was general activity, a very small effect that fixed, that solved this problem. It was a very small effect, but strong enough to change from Newton to general activity.
STFC-RAL-CR03 R61: And, of course, there are new effects than the previous counterparts.
STFC-RAL-CR03 R61: So this is just to say that we have to very carefully when we have the type of remotes. So these, maybe the small effect, weak field effect in the Milky Way cannot be neglected anymore, or has to be considered in a different framework.
STFC-RAL-CR03 R61: As part of the galaxy's concern, we know that the galaxy
STFC-RAL-CR03 R61: Usually, the classical model, basically,
STFC-RAL-CR03 R61: they consider the Poisson equation, which is made by different components, density component, for the bulge, for the thinness at least, and also for the white hull.
STFC-RAL-CR03 R61: all these come by the plug into the Personal equation. Of course, they depend upon many parameters. We depend on the mass of the fintech, the size of the bulge, and so on.
STFC-RAL-CR03 R61: So, the equation is that you find the velocity, secular velocity of the sun on the Galactic ring, and that you derive the Milky Way classical velocity profile.
STFC-RAL-CR03 R61: Of course, if you… if you… if we keep the same baryonic component, you can have
STFC-RAL-CR03 R61: model the galaxy, because, for example, the MOND model, which is, which is, Monde considered,
STFC-RAL-CR03 R61: a modification accelerate Newton acceleration via this interpolation function, which is a small, region, is,
STFC-RAL-CR03 R61: is getting these transitions between the new and deep monarchy through the solutions called G0, because G0 is constrained by this radical subdivision, region.
STFC-RAL-CR03 R61: all these type of galaxies. So there is a correction, small correction, on the… on the Newtonian acceleration, and then you can derive also, in this case, the profile.
STFC-RAL-CR03 R61: You can change also the, the profile for the hull, for example, take into account the NASA density profile, which considers constraint by cosmological simulation with its parameter related to the
STFC-RAL-CR03 R61: Of course, depends on the density, characteristic density, and the scale density, shape, and etc.
STFC-RAL-CR03 R61: Which are related to, to value found in the cosmology.
STFC-RAL-CR03 R61: When we move to generativity, because it's the most difficult fact, because we knew, we know a very few exact solutions of general relativity. So it's very difficult to solve a Eisen equation.
STFC-RAL-CR03 R61: But if we think just at the metric disk and not the metric of the whole galaxies.
STFC-RAL-CR03 R61: For example, we can take into consideration the line element, the solution of the external equation, which is a bronze solution describing as a symmetric stationary spacetime.
STFC-RAL-CR03 R61: And, and for the, for the, for the disk, for example, you can consider just a dust regenerativity, which means that stars are directing only gravity, gravity, yeah, gravity, gravity moment.
STFC-RAL-CR03 R61: that this is an equilibrium configuration as a fresh rotating rotating factor 2. It's a simple model.
STFC-RAL-CR03 R61: And, of course, this, is valid because we know, of course, that stars in winter are not, effective, over the warm-upfrid scale, and also the galaxy can be considered… it's only isolated around 125 kilopon seconds.
STFC-RAL-CR03 R61: So it could be a good approximation to describe the dust, the model such makes the list of galaxy in general activity.
STFC-RAL-CR03 R61: Now.
STFC-RAL-CR03 R61: here is the most hard part to understand, because here you enter the protocol measurement in general activity, because it's different from Newton. In Newton, we don't need to define the observer. In general thinking, we need to define the observer if you need to define the measurement.
STFC-RAL-CR03 R61: So, any star, any circular motion, it's such a method, you can
STFC-RAL-CR03 R61: Represent with respect to a suitable copying our system.
STFC-RAL-CR03 R61: For a suitable, hot server, which, for example, this one, is a zero angular momentum hot server, which means that I'm not locally rotating both servers, moving on one line of terminal to either Super 3601 constant, the splitting of space time.
STFC-RAL-CR03 R61: And they are used to… they have the definition, you can… you can change from… this is for a static, for example, static observer, and this is for a zero angular momentum observer. Of these… these equations.
STFC-RAL-CR03 R61: And occupying this relationship between this component. This component is the sparsier as in the velocity.
STFC-RAL-CR03 R61: With respect to this other component coordinate value, the coordinate velocity.
STFC-RAL-CR03 R61: Got it, cool.
STFC-RAL-CR03 R61: So, basically, you… we are related. This is the coordinate angular velocity, which is used in the Newtonian framework.
STFC-RAL-CR03 R61: Here, in general theory, when you want to define a measurement with respect to the zero angular momentum server, your cell which is not rotating, since I want to measure a rotation, I use your server that in that location is not rotating.
STFC-RAL-CR03 R61: Because I want to make… measure the rotation, otherwise…
STFC-RAL-CR03 R61: And then this is… you can see here that this… the classical velocity is modulated by the geometrical factor.
STFC-RAL-CR03 R61: Here, I have… this is a… this is a general definition. I haven't defined any… specified any specific solution of Allison equation. I used just the symmetric… systematic station and spacetime.
STFC-RAL-CR03 R61: Of course, I think split to consider just a component due to the kinematics compared to the driving. This is the driving, which I will show in a while.
STFC-RAL-CR03 R61: And then, well, this variation for astronometer is important, this space-time variation, because this space-time variation allows you to define, to make a comparison with a different point of the spacetime.
STFC-RAL-CR03 R61: in, it's a synchronization of space-time, because I am… the aim is to reconstruct the rotation forward.
STFC-RAL-CR03 R61: And when we, these are… these are… this… of course, we need to solve the, the metric, the, the func… the… the function inside the metric.
STFC-RAL-CR03 R61: And this isn't a very difficult task to find the exact solution, but if we, we put ourselves in a regulatory dust, so we just, in an ideal
STFC-RAL-CR03 R61: environment that we, we can do with our disk. This out of balancing, found the solution for the, line element.
STFC-RAL-CR03 R61: That is a client element.
STFC-RAL-CR03 R61: Skipper. It's this one.
STFC-RAL-CR03 R61: It's this magic function.
STFC-RAL-CR03 R61: And, defined is a solution.
STFC-RAL-CR03 R61: analytical solution, but up the price of some, I mean, some, some constraint. For example, this solution is valid only in this figure region. It means that it's not valid very close
STFC-RAL-CR03 R61: To the axis of the, of the, the way, the peak center.
STFC-RAL-CR03 R61: And this, and this, and this, the vertical is correspond by this co… this for the vertical.
STFC-RAL-CR03 R61: A solution should be less of this averaging parameter. This solution, in fact, depends on three parameters, the bulge size, the extension of the meteorave disk, and the velocity deflection.
STFC-RAL-CR03 R61: you can see that when you apply, so this, this, you can find the solution by solving the Einstein equation for a dust, static dust, and you suggest that you have, instead of one Poisson equation, like Poisson equation, you have here five equations.
STFC-RAL-CR03 R61: So, with one equation, you can find the profile over the metric function, and the another equation gives you the density, which is separated before the velocity.
STFC-RAL-CR03 R61: Then we had also, in our approach, we had another parameter, the conformal factor, that was another metric function in the line element.
STFC-RAL-CR03 R61: Because the other method in the static, that solution, the other, financial restrictions. I will quickly go into time.
STFC-RAL-CR03 R61: But, okay. Now, let's invite to our galaxy. So, stars and matrix this time mainly to have solutions for systems which are quite general.
STFC-RAL-CR03 R61: But our galaxies, you know, just a global solution, are we understood? We cannot expect to find a global solution for the entire galaxy by the Einstein equation.
STFC-RAL-CR03 R61: So, we have, for example, the Baj region that are…
STFC-RAL-CR03 R61: very complicated, maybe we need aerodynamical simulation to take on this part of the galaxy, and know that Gaia, for example, has discovered three black stellar black hole. One is very close in the disk, 500,000 from us, so there's not only the black hole in the center of the two EMA, there are also the black hole of the disk of the galaxy.
STFC-RAL-CR03 R61: Then we have sphere arms, we have the work, we have the action, we have the clearing effect, and then we have the list. So it's a multi-compositeology, so we have to find a way to match different icing solutions
STFC-RAL-CR03 R61: which is large part of the galaxy. Of course, it's a very complicated step. But let's focus on the disk. We see that we can define the spatial, the ultimate spatial velocity, we can measure it by the zero incremental 7.
STFC-RAL-CR03 R61: with this formula, if the Euclidian velocity is negligible as the post-Newton approximation I'll show you before.
STFC-RAL-CR03 R61: beta is negligible. We see that the spatial velocity measured by the sum as X as P is proportional to the optional function.
STFC-RAL-CR03 R61: So, which proportions that this is some gravitational dragging its work and the scale.
STFC-RAL-CR03 R61: Of course, this off-dema is very different for the octagon that we used in the definition in the very same celestial reference system inside the solar system.
STFC-RAL-CR03 R61: So now, this is an answer. Should be this gravitational driving
STFC-RAL-CR03 R61: an effect of dark matter, let me say, that can display the tightness rotation curve.
STFC-RAL-CR03 R61: That we can come back to this end up to prove these answers.
STFC-RAL-CR03 R61: Okay, we selected them.
STFC-RAL-CR03 R61: among the 2 billion sources of certain Bagaya, the most accurate and precise, to have the most homogeneous accurate sample to trace the angular momentum of the Mithu Wake.
STFC-RAL-CR03 R61: We, we start… this is the, the, these were the, the six requirements, 12 conflict automated set. This, this is a parameter that we don't select single sources.
STFC-RAL-CR03 R61: The parallel has been concerned, and also in order to assure a proper 6D request action on the specific location of the high dimension, the last step.
STFC-RAL-CR03 R61: I've never argued by the same observed. It's a fundamental
STFC-RAL-CR03 R61: requirement generativity. And of course, then we transformed things in the Gala to say it recorded for the solar system. So we had, 6,000, objects in the Gaia, and then we moved, for the, we, we answered the same for,
STFC-RAL-CR03 R61: most 1 million sources, and this is the distribution of the sources. The sample, for example, this is the lactic centers, this is the distribution of the standard user for the automatic, because they gave automatic restarts, they ever want to.
STFC-RAL-CR03 R61: say, just to look at the…
STFC-RAL-CR03 R61: Far, and also we… we avoid… we try to circular, low exchange target mode to be… to be consistent with the circular velocity that we want to mesh, to… to fit, and also to my… we try to… to put this constraint to my, my, to my mind, so how long it is.
STFC-RAL-CR03 R61: Okay, this was the result with the DR2, but I just want to show you this one the difference with the DR3. I will most concentrate on the result with the battery industry.
STFC-RAL-CR03 R61: So this is… in black block style, you can see the median at single velocity at the median distance from the velocity center. In blue, you have the velocity profile for the classical model. In orange, the velocity profile gives you the NASTO profile.
STFC-RAL-CR03 R61: In red, the profile, the relativistic model, and in green, the profiling mode, you can see that all the data points, all the models are statistically equivalent.
STFC-RAL-CR03 R61: we get, with the data. So this is, awesome.
STFC-RAL-CR03 R61: the result of the original sample, of course, they are very consistent with each other, the result of the best fit estimate of the radiance of the posterior column sigma sigma cry ball inverse are very consistent. Just the,
STFC-RAL-CR03 R61: for the mass of the badge of the significant compared to the model, the classical model.
STFC-RAL-CR03 R61: for the BGB model, we see regret again.
STFC-RAL-CR03 R61: Good.
STFC-RAL-CR03 R61: physical result for 3 parameter, for the size of the barge and the outer part, and the velocity regime.
STFC-RAL-CR03 R61: And also, we can consistently posture with the anastro, with the parameter in the store profile.
STFC-RAL-CR03 R61: Then, we move to consider also the density profile, and in the range of data that we used. All the, again, all the density profile for the model are consistent, there are no divergencies.
STFC-RAL-CR03 R61: And of course, just for that sector, we have the urgency for the… for the hallow, the center of the hollow, but also the total, the background of the Milky… the Langdassadium, and the Milky Way are considered.
STFC-RAL-CR03 R61: So this is… we say, say that, forsofar as the Ratrisk model, since the RTLIST model picked the velocity profile, the RTListi model does not have the Howard on hand.
STFC-RAL-CR03 R61: But, of course, we, we… the four parameters that we have is one we fit, because we… the likelihood that
STFC-RAL-CR03 R61: analysis of this parameter, because we couldn't… we have just one point, because it's at the sun, we measure the density of the sun, and we don't have many points, because…
STFC-RAL-CR03 R61: much more this parameter. But, of course, with the comma, in such case, we can define the mass at least context, and then… and actually, we find that these,
STFC-RAL-CR03 R61: The solution of the… mass, or the… derived by the common ignorant.
STFC-RAL-CR03 R61: with respect to the Bionic mass classical model are almost consistent, and there is no deviation. Then we see that the density profiles of models are consistent around the system, and also for the hollow, the density of the halo is consistent of the aspect.
STFC-RAL-CR03 R61: And, the total Marioni mass predicted by the Lantocity model scenarios is slightly smaller than the values I said before, because it depends on the Lantocity MMA model. In fact, it's much more constrained by cosmological consideration.
STFC-RAL-CR03 R61: Yesterday, we see that the value are not much larger than with proposals.
STFC-RAL-CR03 R61: Now, how to code, to understand, to compare the effect, the flatness produces the flatness with respect to the harm effect on, since, the non-tonal counterpart.
STFC-RAL-CR03 R61: So, we, we adopted this, this method to disentangle the dragging effect from the velocity profile, or the GLC velocity profile. We just use, we consider
STFC-RAL-CR03 R61: in the Poisson equation, the general statistic density profile, in order to get Newtonian, effective Newtonian potential related to the density, hyperbag on the ice equation.
STFC-RAL-CR03 R61: Every subtracted, this, this velocity that should be,
STFC-RAL-CR03 R61: related just the baryonic mass to the, the total profile, ballistic velocity profile. Of course, we, we also find, which, with vertical 8, we… we can keep this, this comparison, of course, because the ballasting mode is a strictly valid along the disk, not every zip.
STFC-RAL-CR03 R61: So, in this case, we are able to determine the amount of gravitational velocity across the nuclear plane with the gravitational driving. And you can see, this is the gravitational driving in the generalistic model, and you see that this cannot completely substitute the halo effect
STFC-RAL-CR03 R61: either 10 or 15 kilopar6. It is already at 50… at the 30-36% of the velocity so far.
STFC-RAL-CR03 R61: So, this is an… he says that,
STFC-RAL-CR03 R61: Also, the model is overlapping with the higher profile.
STFC-RAL-CR03 R61: So all these three results, so the velocity profile, the density profile, and the dark effect that substitute all the three aspects that point from Greek to the beyond that, there is some gravitational ground, it will use the effect of general activity that sustains the flat, the quasi flatness and rotation code.
STFC-RAL-CR03 R61: Not just one, and it is compared to the other solution.
STFC-RAL-CR03 R61: Now, as I said, that are independent from theoretical models that use for the prediction, and that is exactly what we constituted plastic ground.
STFC-RAL-CR03 R61: The generalistic model should be considered a toy model, maybe for this, as all different parameters exists 10 or 13, 14 parameters of the other model.
STFC-RAL-CR03 R61: So that matter does not associate with light, but we start responding to the gravity force. It has just a calculation of an external. Mons require an adjustment in the low acceleration regime.
STFC-RAL-CR03 R61: I lost a lot of CDMRs that require much more mass for participants written on the cosmological simulation, so general activity would imply the gravitational driving.
STFC-RAL-CR03 R61: That might, like, affect the drive with the occipitation function, the geometry, and seeing, but perceived as manifestation of gravity.
STFC-RAL-CR03 R61: According to Einstein equation, it's a responsible computer.
STFC-RAL-CR03 R61: Here we are considering the exact solution, or is an equation, at large scale, not small… not small scale.
STFC-RAL-CR03 R61: So, it's likely that we have tested all space, that's masks how to move.
STFC-RAL-CR03 R61: By setting what is the average, we have to make a selection. We would like to burst on general activity, because general activity is under theory of gravity.
STFC-RAL-CR03 R61: So, and of course, they separate last an equation normally to separate density and velocity. We can analyze the potential modification, extensor generativity, printing the ground, of course, against the background of generative non-Newtonian theory.
STFC-RAL-CR03 R61: we can establish what extent in Milky Way or not, where it's not possible, why we shouldn't necessitate a mutual gravity.
STFC-RAL-CR03 R61: And then we need to identify further a mathematical solution on that equation.
STFC-RAL-CR03 R61: So, at the scale between the lines can be dominated. In fact, for example, waves happen for whales or legs per head towards space time, a new temporal simulation is valid only local.
STFC-RAL-CR03 R61: We extend also a more of this, our galaxy, proofed by the… the explicitarian data.
STFC-RAL-CR03 R61: can be considered a template for other galaxies. Now we are moving to check the visibility across the external galaxies, and for example, this philosophy profile. We need to… we need a little bit of framework to understand that, or to, to define the density, because it's another kind of measurement for external galaxies. We have a direct measure of external galaxies derived as a surface drive, and something different.
STFC-RAL-CR03 R61: Of course, the velocity profile agree with you, for example, with the sport model of generality.
STFC-RAL-CR03 R61: So, next development we'll be able to finish, so we have a…
STFC-RAL-CR03 R61: Of course, we have to prove these,
STFC-RAL-CR03 R61: Although it's very effective model, for example, we have established a matching condition for different parts of the metric of the galaxies, which is the empty space, as it does not imagine matching condition on the present resolution.
STFC-RAL-CR03 R61: in empty space, we need to introduce a dynamical simulation, for example, is a loss of system, or some hardware to consider now.
STFC-RAL-CR03 R61: Pressure fluid, something like this.
STFC-RAL-CR03 R61: And then there was also, we are doubling the process of internal activity that means, for example, merge some solution-wise equation. Quite essentially, there are very interesting results from the mathematical point of view, for example, which is a singularity in one solution.
STFC-RAL-CR03 R61: could be an angular moment to another part of the space-time. So this bluing process is very important now for this kind of a research. And then, to set the tips, we can use this, our galaxy as template also for other galaxies.
STFC-RAL-CR03 R61: Then there is also another outstanding approach that we are taking, the fact that all cosmological simulations should collapse a water closer today in our galaxy, so that what we have found, for example, the observed rotation curve and so on, can be the constraint for this cosmological simulation, and it's a relationship.
STFC-RAL-CR03 R61: So, this is our conclusion.
STFC-RAL-CR03 R61: Of course, we are.
STFC-RAL-CR03 R61: the best of guides seem to come with the alphabia, going to improve to a larger stop, and I think that I missed it to say that we keep a range of data at 4.5 kiloparse, because we don't want to go close to the badge, because all the symmetrix, stationary assumption is not anymore valid.
STFC-RAL-CR03 R61: And then we stop the 19 kilopar percent because of the current distance, actually, 20%.
STFC-RAL-CR03 R61: With GAP4, GAP5, we are able to extend much more, and to see improve with this flatness of the Champled range.
STFC-RAL-CR03 R61: So, we have learned a lot. For sure, the… to have a title, the paradigm, the fact that we are very obligated to use generativity changed completely the paradigm of… we have to move to artistic as song and producer.
STFC-RAL-CR03 R61: For example, in this case, as I showed you before, at least the quantity difference between a Newtonian approach and at least approach in some regards. So, when we use Ratheistic astronomy, because I mean, it reminds me that with the other, what was removed by introducing a new kinematis.
STFC-RAL-CR03 R61: not looking for molecular forces learned, but the nuclear mass. Another course also from,
STFC-RAL-CR03 R61: understanding the physics inside, the telephysics inside the metric, maybe help also to understand better the, for example, the problem dark energy, because we are moving to understand the scalar distance and systematics related to… Thank you very much for your attention. Sorry, keep long.
STFC-RAL-CR03 R61: Thank you very much. Questions?
STFC-RAL-CR03 R61: That's from whom?
STFC-RAL-CR03 R61: So, do we know just how much missing matter there is there?
STFC-RAL-CR03 R61: You didn't come up with a number.
STFC-RAL-CR03 R61: Well, we know that there's, 25% of the universe is, missing dark matter, right? Can you measure what is in the Milky Way? Yes, we measured the… How much was it? There was agreement with the…
STFC-RAL-CR03 R61: You mean this?
STFC-RAL-CR03 R61: Yes. There was an agreement, what we expected for the, when we considered HAL, that matter. This is an agreement with your measurement. Yes, that's the 10%. Yeah, yes. So, but of course, the difference, when you use general activity, the mode of general activity does not need HAL.
STFC-RAL-CR03 R61: We don't know how long. So, at the number, by the baryonic matter.
STFC-RAL-CR03 R61: is consistent with the mid-ex mass. So the other question is, is baryonic matter homogeneous in halo?
STFC-RAL-CR03 R61: But there is no baryonic matter in the halo, but there's much more on the disk. Okay, so the question then is, so most of the baryonic matter is in the disk? Yeah, there are some streams that are about… Yeah, very little in the halo.
STFC-RAL-CR03 R61: So, the question then would be, how do you work out… work a hydrodynamic theory into this model?
STFC-RAL-CR03 R61: Oh, okay. We have to implement, of course, aerodynamic artilliness model. We don't have the model for the swim in the hollow between this, of course. Yes. But this is just, we focus on the rotation curve for the galaxy. Right. This is the term… it's supposed to be hollow to take into account the flatness. So, the number according to the mass, the bionic mass, the density are all in agreement between the model, so we cannot exclude
STFC-RAL-CR03 R61: to one more than the other.
STFC-RAL-CR03 R61: It's probably for its general activity, because,
STFC-RAL-CR03 R61: So, you… of course, there are… there will be some now, for example, all the structure inside of the halo.
STFC-RAL-CR03 R61: can be determined by gravity, by interaction of gravity, not necessarily for the house as the work shows, so we don't need help from the work, for example, the procession of the work.
STFC-RAL-CR03 R61: Thank you. I'll continue.
STFC-RAL-CR03 R61: At some point, you started talking about the gravitational drag in the disc.
STFC-RAL-CR03 R61: And maybe I didn't catch it. I didn't exactly understand how the baryonic matter created the gravitational drag disk. No, it's not dependent, it's just the geometrical effect, a thermotor effect.
STFC-RAL-CR03 R61: There is no bionic matter responsible for the drugging effect. It's just a curvature effect.
STFC-RAL-CR03 R61: So, you have the last 10 equations that tell you of the source of the master, the master, the space of the curve, and spacetime, the mass of the move. This is the second popular. Of course, you need the source.
STFC-RAL-CR03 R61: Probably, we need to understand the origin of this computational target. It's related for sure to the solution of is an equation, one obsolution is an equation.
STFC-RAL-CR03 R61: But probably is the heritage of the coronavirus, background geometry that we know from the galaxy image. When galaxy formed, there was some geometry, and this is the equilibrium geometry, let me see, the drag…
STFC-RAL-CR03 R61: The star, the rotation drop the stars. So it's a purely geometrical effect, not dependent on value.
STFC-RAL-CR03 R61: So, of course, you need to stay… we don't do… this explains the flatness, the rotation curve, but without any… we don't… you don't need extra mass. Just the bionic mass, you have the stars are dying. This 1 million stars will die, let's say the bionic mass is okay.
STFC-RAL-CR03 R61: And so this, this curvature effect would then not show up in Newtonian calculations, because
STFC-RAL-CR03 R61: There does not exist in Newtonian, this kind of effect. So you have gravitomagnetism, which is produced by the carbon mass, okay, but this mass gravitable magnetism, so we…
STFC-RAL-CR03 R61: As examples, I would prefer to say that gravitational driving, because we then need to understand the region. So it could be geometric… some geometrical evolution of the galaxies that the stars find themselves in its geometry.
STFC-RAL-CR03 R61: That was due to the formation of galaxies, the formation of galaxies, but is not related to the current mass. It's not the star, the velocity of the star that produced such an effect. This is a small effect, as in the solar system.
STFC-RAL-CR03 R61: It's a larger effect. So this is kind of like the lens tiering effect? Need to think about lens tearing, yes, yes, but a larger scale. You're celebrating a different scale.
STFC-RAL-CR03 R61: So, that's… and then there is also… I've been… I've been going to detail, of course, because we have three different, let me say, a synodic observer. For the BCRS, you have stuff which depends on local gravitational field. You have another observer, which depends on the geometric of the gravitational field of the disk.
STFC-RAL-CR03 R61: So you are expecting that this could both asyotical match with the empty space-time, with the passing infrared system. So it's likely that we are… we are checking that there are differences with the geometric geometry, because we are immersed in the galaxy.
STFC-RAL-CR03 R61: But also, our system, all the astronomical measurements are… are theremin.
STFC-RAL-CR03 R61: I compared it to the quasar, but individually, the quasar can also have systems in the geometer of the galaxy.
STFC-RAL-CR03 R61: And though this dragging effect can be the evolution of the grades, the mismatch between different natural selection.
STFC-RAL-CR03 R61: Patrons don't…
STFC-RAL-CR03 R61: the systematics on this, then, if it comes out of the solution, the only stem equations. Do you need a suite of different solutions, or is there actually some way of, kind of.
STFC-RAL-CR03 R61: heuristically working out what the… You mean systematic in this test? From the model, yeah.
STFC-RAL-CR03 R61: No, it is… for the modeling in the basic… here, you don't have, we use the Gaia data are very accurate here.
STFC-RAL-CR03 R61: So, we use a lot of documents to estimate.
STFC-RAL-CR03 R61: Sylvia, hold on.
STFC-RAL-CR03 R61: It was an extra slide, I don't want to… No, my name…
STFC-RAL-CR03 R61: So we used, in this case, we, we just fit the data, estimate.
STFC-RAL-CR03 R61: Because the Gaia data are so accurate. No, I'm sure, I mean, I'm sure the experimental inserts are done… But you mean systematic in the Gaia data analysis? No, I mean… I mean in the…
STFC-RAL-CR03 R61: And you have some model that comes from the geo model, and the incentives on that are…
STFC-RAL-CR03 R61: hard to explore, I imagine, if it's… you know, you assume some… you have to assume some… some solution to the outstanding equations. Yeah, this is a solution. So it's a… it's a single point…
STFC-RAL-CR03 R61: No, okay. Feed the data in, the data in to the… to the… this is giving these solutions.
STFC-RAL-CR03 R61: This is an equation. In some particular conditions, that, you have a… you fix one metric function, in these cases, it's called the static-dust solution.
STFC-RAL-CR03 R61: And, then you solve the Einstein-KL5 equation, and let's it, you find the disk solution by this modified by the functions by trying to fix the constraint, the custom, in order to have a physical… it's a physical tail solution for the disk.
STFC-RAL-CR03 R61: It's not… so you cannot extend it to the RC theater, but…
STFC-RAL-CR03 R61: as a toy model, let me say, it's very rare to find the exact solution that fits so well the data. So, there's a few parameters.
STFC-RAL-CR03 R61: So, it depends. So, we choose this solution because AS parameter of the solution that you can test. So, I know if I catch correctly your question. So, in this case.
STFC-RAL-CR03 R61: We are not checking systematic the mixed model, we are just comparing the story model with the classic and the widely used model, model and dominance, so… and they… they are quite equivalent, statistically equivalent.
STFC-RAL-CR03 R61: Yeah, sorry. How long does the data go? I mean, you…
STFC-RAL-CR03 R61: your curves diverge a bit at the low end. I mean, half… how far in the…
STFC-RAL-CR03 R61: You mean… Can you go back to the side you wanted me to go with the… where the, when the frame dragging kicks in. You, you see it here. Okay, but these are not real, because I'm not understanding. This part… No, no, no, not this one, sorry, the, the, the curves.
STFC-RAL-CR03 R61: Pure.
STFC-RAL-CR03 R61: Yeah, I'm just wondering, how low in…
STFC-RAL-CR03 R61: How long distance to the data count? The data for… the accurate data, I said, we have go up to 99 kilopars, 90 kiloparsec.
STFC-RAL-CR03 R61: Okay, because we… at that, distance, we have the power circulate at 20%. Yeah. But, of course, here, this is not available because we are not corresponding between data. Yeah, that's what I was wondering, how low can you… Okay, we can go, we can go clatter, like, another slide in the parking room.
STFC-RAL-CR03 R61: We're just,
STFC-RAL-CR03 R61: That is one.
STFC-RAL-CR03 R61: For example.
STFC-RAL-CR03 R61: We compared this work with, with, Kleberg and Sam de use, the guy at the R2B data, and some authors, and they found that this is a Klebergian of… of the, the methyl rotational curve.
STFC-RAL-CR03 R61: But they use a bootstrap technique, so to go to… and then they mix all the measurements of parallaxes of distance. So, it's different for us, because we see this, a slight decline around the 18th, but it's still a decline, and it's still sustainable by the blackness.
STFC-RAL-CR03 R61: So, we were going through, but we're going to stick with the F2. We're going through the F4. With the F4, we are going to really check if this is a sliding decline, if we confirm the decline, or it's… Yeah, I know there's a lot of discussion about the…
STFC-RAL-CR03 R61: models when you get… when you get out there. I was… I was wondering more, kind of more on the other, when you go down to… to 5.6, just, you know, your… the GR model looks like it is ripped up, rather than…
STFC-RAL-CR03 R61: No, no, it goes down. If you can see, you can see, this is the… it goes down, the extrapolation.
STFC-RAL-CR03 R61: But, of course, we have to… this is a psychological simulation part.
STFC-RAL-CR03 R61: For example, here.
STFC-RAL-CR03 R61: You can see, yep.
STFC-RAL-CR03 R61: It's going down, the red part.
STFC-RAL-CR03 R61: More than this recollational, the classical one.
STFC-RAL-CR03 R61: your horse.
STFC-RAL-CR03 R61: It's going directly down.
STFC-RAL-CR03 R61: So, we are spectacular. So, also another analytical,
STFC-RAL-CR03 R61: mathematical consideration, asymptotic Eco is going to asymptotic on the platinum, so it's not going to increase the…
STFC-RAL-CR03 R61: So, but we will see with the next data, this compartment or not. Do we have any questions from Zoom?
STFC-RAL-CR03 R61: If there is, please just unmute and fire up.
STFC-RAL-CR03 R61: Any other questions from Booth?
STFC-RAL-CR03 R61: If I can ask, maybe? So, for the… PE water.
STFC-RAL-CR03 R61: I mean, it does have limitations in terms of, if you try to explain the hello part, the delicate hello part, and so on, but for disk, explain the disk animatics, and so on, are there any limitations which you think are there?
STFC-RAL-CR03 R61: We cannot use a VG model at zero, for sure. But, of course, our galaxies, the thick disc is 1.1 kiloparsec, right?
STFC-RAL-CR03 R61: So, if you see our data in our GET data, analysis, Thank you.
STFC-RAL-CR03 R61: You can see that, for example, we do see all the sources are very steep on the found in the disk. We can have not…
STFC-RAL-CR03 R61: 0.203 kilopatts per clinic.
STFC-RAL-CR03 R61: So, of course, this model is piled just on this far away of the region.
STFC-RAL-CR03 R61: But I suspect, since it's responded so effectively with data, I suspect there should be some limit or some much more general solution to find. Maybe through the process, we were able to find this solution to obligate a little bit, like, by having the pressure experiment.
STFC-RAL-CR03 R61: Conclusive.
STFC-RAL-CR03 R61: But it's surprising, it was just reselected as the solution, because I said, as a clear parameter fit.
STFC-RAL-CR03 R61: But it was just a surprise to see that it fit so well, with respect, especially in terms of the model is a research. They're very well known.
STFC-RAL-CR03 R61: Thank you.
STFC-RAL-CR03 R61: I hope that didn't answer your question.
STFC-RAL-CR03 R61: So, I was wondering, like.
STFC-RAL-CR03 R61: Can we apply, like, what is the scope of applying the GR model to other galaxies? Because I guess Gaia gets a lot of data in the galaxy, but…
STFC-RAL-CR03 R61: Yeah, because with that, you have the detail that you cannot have by several other galaxies. It says here, 2 billion objects are very close on each individual point.
STFC-RAL-CR03 R61: It's a trace of gravitational potential.
STFC-RAL-CR03 R61: So you know everything about this orchard. In the other 7 galaxy, you don't have this… now we are trying to do the Andromeda Galaxy, for example, but you don't have the… so it's like just… you use the sun.
STFC-RAL-CR03 R61: to calibrate the physical and stellar evolution of the sun, everything related to the mass, the energy of the sun. The same should be with our galaxies. Since we can go deeper into the galaxy with such details.
STFC-RAL-CR03 R61: we can, of course, start to see the galaxies as the physical template for another spirit, seen as spiral galaxies, of course, not only us. But here, if this is,
STFC-RAL-CR03 R61: This scenario is confirmed, means that we have to find the suitable geometry for the cluster of galaxy, for the length cylinder. So if I use just a spherical metric solution, I could not find the magnetic effect.
STFC-RAL-CR03 R61: We just changed the program.
STFC-RAL-CR03 R61: In criminalizing his tallest, of course.
STFC-RAL-CR03 R61: And it's a huge book, of course. It's not easy to ask. Okay, thank you. Let's thank our speaker again.
STFC-RAL-CR03 R61: Please, join.