000006065 001__ 6065
000006065 005__ 20240108165330.0
000006065 0247_ $$2DOI$$a10.1051/0004-6361/202243511
000006065 037__ $$aSCART-2023-0026
000006065 100__ $$aGaia Collaboration
000006065 245__ $$aGaia Data Release 3: Chemical cartography of the Milky Way
000006065 260__ $$c2023
000006065 520__ $$aContext. The motion of stars has been used to reveal details of the complex history of the Milky Way, in constant interaction with its environment. Nevertheless, to reconstruct the Galactic history puzzle in its entirety, the chemo-physical characterisation of stars is essential. Previous Gaia data releases were supported by a smaller, heterogeneous, and spatially biased mixture of chemical data from ground-based observations. Aims. Gaia Data Release 3 opens a new era of all-sky spectral analysis of stellar populations thanks to the nearly 5.6 million stars observed by the Radial Velocity Spectrometer (RVS) and parametrised by the GSP-Spec module. In this work, we aim to demonstrate the scientific quality of Gaia’s Milky Way chemical cartography through a chemo-dynamical analysis of disc and halo populations. Methods. Stellar atmospheric parameters and chemical abundances provided by Gaia DR3 spectroscopy are combined with DR3 radial velocities and EDR3 astrometry to analyse the relationships between chemistry and Milky Way structure, stellar kinematics, and orbital parameters. Results. The all-sky Gaia chemical cartography allows a powerful and precise chemo-dynamical view of the Milky Way with unprecedented spatial coverage and statistical robustness. First, it reveals the strong vertical symmetry of the Galaxy and the flared structure of the disc. Second, the observed kinematic disturbances of the disc — seen as phase space correlations — and kinematic or orbital substructures are associated with chemical patterns that favour stars with enhanced metallicities and lower [alpha/Fe] abundance ratios compared to the median values in the radial distributions. This is detected both for young objects that trace the spiral arms and older populations. Several alpha, iron-peak elements and at least one heavy element trace the thin and thick disc properties in the solar cylinder. Third, young disc stars show a recent chemical impoverishment in several elements. Fourth, the largest chemo-dynamical sample of open clusters analysed so far shows a steepening of the radial metallicity gradient with age, which is also observed in the young field population. Finally, the Gaia chemical data have the required coverage and precision to unveil galaxy accretion debris and heated disc stars on halo orbits through their [alpha/Fe] ratio, and to allow the study of the chemo-dynamical properties of globular clusters. Conclusions. Gaia DR3 chemo-dynamical diagnostics open new horizons before the era of ground-based
000006065 536__ $$aGaia PRODEX/$$cGaia PRODEX/$$fGaia PRODEX
000006065 594__ $$aNO
000006065 6531_ $$aGalaxy: abundances
000006065 6531_ $$aStars: abundances
000006065 6531_ $$aGalaxy: evolution
000006065 6531_ $$aGalaxy: kinematics and dynamics
000006065 6531_ $$aopen clusters and associations
000006065 6531_ $$aGalaxy:structure
000006065 6531_ $$aGalaxy: disc
000006065 6531_ $$aGalaxy: halo
000006065 700__ $$aRecio-Blanco, A.
000006065 700__ $$aKordopatis, G.
000006065 700__ $$ade Laverny, P.
000006065 700__ $$aPalicio, P. A.
000006065 700__ $$aSpagna, A.
000006065 700__ $$aSpina, L.
000006065 700__ $$aKatz, D.
000006065 700__ $$aRe Fiorentin, P.
000006065 700__ $$aPoggio, E.
000006065 700__ $$aMcMillan, P. J.
000006065 700__ $$aVallenari, A.
000006065 700__ $$aLattanzi, M. G.
000006065 700__ $$aSeabroke, G. M.
000006065 700__ $$aCasamiquela, L.
000006065 700__ $$aBragaglia, A.
000006065 700__ $$aAntoja, T.
000006065 700__ $$aBailer-Jones, C. A. L.
000006065 700__ $$aAndrae, R.
000006065 700__ $$aFouesneau, M.
000006065 700__ $$aCropper, M.
000006065 700__ $$aCantat-Gaudin, T.
000006065 700__ $$aHeiter, U.
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000006065 700__ $$aBrown, A. G. A.
000006065 700__ $$aPrusti, T.
000006065 700__ $$ade Bruijne, J. H. J.
000006065 700__ $$aArenou, F.
000006065 700__ $$aBabusiaux, C.
000006065 700__ $$aBiermann, M.
000006065 700__ $$aCreevey, O. L.
000006065 700__ $$aDucourant, C.
000006065 700__ $$aEvans, D. W.
000006065 700__ $$aEyer, L.
000006065 700__ $$aGuerra, R.
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000006065 700__ $$aJordi, C.
000006065 700__ $$aKlioner, S. A.
000006065 700__ $$aLammers, U. L.
000006065 700__ $$aLindegren, L.
000006065 700__ $$aLuri, X.
000006065 700__ $$aMignard, F.
000006065 700__ $$aPanem, C.
000006065 700__ $$aPourbaix, D.
000006065 700__ $$aRandich, S.
000006065 700__ $$aSartoretti, P.
000006065 700__ $$aSoubiran, C.
000006065 700__ $$aTanga, P.
000006065 700__ $$aWalton, N. A.
000006065 700__ $$aBastian, U.
000006065 700__ $$aDrimmel, R.
000006065 700__ $$aJansen, F.
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000006065 700__ $$aCastañeda, J.
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000006065 700__ $$aFabricius, C.
000006065 700__ $$aFrémat, Y.
000006065 700__ $$aGalluccio, L.
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000006065 700__ $$aMasana, E.
000006065 700__ $$aMessineo, R.
000006065 700__ $$aMowlavi, N.
000006065 700__ $$aNicolas, C.
000006065 700__ $$aNienartowicz, K.
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000006065 700__ $$aBusonero, D.
000006065 700__ $$aBusso, G.
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000006065 700__ $$aClementini, G.
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000006065 700__ $$aDavidson, M.
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000006065 700__ $$aPeñalosa Esteller, X.
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000006065 700__ $$aRichards, P. J.
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000006065 700__ $$aSáez Núñez, A.
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000006065 700__ $$aSamaras, N.
000006065 700__ $$aSanchez Gimenez, V.
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000006065 700__ $$aTaylor, M. B.
000006065 700__ $$aTeixeira, R.
000006065 700__ $$aTolomei, L.
000006065 700__ $$aTonello, N.
000006065 700__ $$aTorra, F.
000006065 700__ $$aTorra, J.
000006065 700__ $$aTorralba Elipe, G.
000006065 700__ $$aTrabucchi, M.
000006065 700__ $$aTsounis, A. T.
000006065 700__ $$aTuron, C.
000006065 700__ $$aUlla, A.
000006065 700__ $$aUnger, N.
000006065 700__ $$aVaillant, M. V.
000006065 700__ $$avan Dillen, E.
000006065 700__ $$avan Reeven, W.
000006065 700__ $$aVanel, O.
000006065 700__ $$aVecchiato, A.
000006065 700__ $$aViala, Y.
000006065 700__ $$aVicente, D.
000006065 700__ $$aVoutsinas, S.
000006065 700__ $$aWeiler, M.
000006065 700__ $$aWevers, T.
000006065 700__ $$aWyrzykowski, Ł.
000006065 700__ $$aYoldas, A.
000006065 700__ $$aYvard, P.
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000006065 773__ $$cA38 (50pp)$$pAstronomy & Astrophysics$$v674$$y2023
000006065 8560_ $$fronny.blomme@observatoire.be
000006065 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2022arXiv220605534G/abstract
000006065 85642 $$ahttps://arxiv.org/abs/2206.05534
000006065 905__ $$apublished in
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