000006064 001__ 6064
000006064 005__ 20240108165416.0
000006064 0247_ $$2DOI$$a10.1051/0004-6361/202243782
000006064 037__ $$aSCART-2023-0025
000006064 100__ $$aGaia Collaboration
000006064 245__ $$aGaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure
000006064 260__ $$c2023
000006064 520__ $$aContext. The Gaia DR3 Catalogue contains for the first time about eight hundred thousand solutions with either orbital elements or trend parameters for astrometric, spectroscopic and eclipsing binaries, and combinations of them. Aims. This paper aims to illustrate the huge potential of this large non-single star catalogue. Methods. Using the orbital solutions together with models of the binaries, a catalogue of tens of thousands of stellar masses, or lower limits, partly together with consistent flux ratios, has been built. Properties concerning the completeness of the binary catalogues are discussed, statistical features of the orbital elements are explained and a comparison with other catalogues is performed. Results. Illustrative applications are proposed for binaries across the H-R diagram. The binarity is studied in the RGB/AGB and a search for genuine SB1 among long-period variables is performed. The discovery of new EL CVn systems illustrates the potential of combining variability and binarity catalogues. Potential compact object companions are presented, mainly white dwarf companions or double degenerates, but one candidate neutron star is also presented. Towards the bottom of the main sequence, the orbits of previously-suspected binary ultracool dwarfs are determined and new candidate binaries are discovered. The long awaited contribution of Gaia to the analysis of the substellar regime shows the brown dwarf desert around solar-type stars using true, rather than minimum, masses, and provides new important constraints on the occurrence rates of substellar companions to M dwarfs. Several dozen new exoplanets are proposed, including two with validated orbital solutions and one super-Jupiter orbiting a white dwarf, all being candidates requiring confirmation. Beside binarity, higher order multiple systems are also found. Conclusions. By increasing by more than one order of magnitude the number of known binary orbits, Gaia DR3 will provide, beside a rich reservoir of dynamical masses, an important contribution to the analysis of stellar multiplicity.
000006064 536__ $$aGaia PRODEX/$$cGaia PRODEX/$$fGaia PRODEX
000006064 594__ $$aNO
000006064 6531_ $$astars: binaries: general
000006064 6531_ $$aastrometry
000006064 6531_ $$astars: brown dwarfs
000006064 6531_ $$astars: planetary systems
000006064 6531_ $$astars: fundamental parameters
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000006064 700__ $$aTaris, F.
000006064 700__ $$aTaylor, M. B.
000006064 700__ $$aTeixeira, R.
000006064 700__ $$aTolomei, L.
000006064 700__ $$aTonello, N.
000006064 700__ $$aTorra, F.
000006064 700__ $$aTorra, J.
000006064 700__ $$aTorralba Elipe, G.
000006064 700__ $$aTrabucchi, M.
000006064 700__ $$aTsounis, A. T.
000006064 700__ $$aTuron, C.
000006064 700__ $$aUlla, A.
000006064 700__ $$aUnger, N.
000006064 700__ $$aVaillant, M. V.
000006064 700__ $$avan Dillen, E.
000006064 700__ $$avan Reeven, W.
000006064 700__ $$aVanel, O.
000006064 700__ $$aVecchiato, A.
000006064 700__ $$aViala, Y.
000006064 700__ $$aVicente, D.
000006064 700__ $$aVoutsinas, S.
000006064 700__ $$aWeiler, M.
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000006064 700__ $$aWyrzykowski, Ł.
000006064 700__ $$aYoldas, A.
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000006064 773__ $$cA34 (58pp)$$pAstronomy & Astrophysics$$v674$$y2023
000006064 8560_ $$fronny.blomme@observatoire.be
000006064 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2022arXiv220605595G/abstract
000006064 85642 $$ahttps://arxiv.org/abs/2206.05595
000006064 905__ $$apublished in
000006064 980__ $$aREFERD