J/A+A/674/A10ivo://CDS.VizieR/J/A+A/674/A10doi:10.26093/cds/vizier.36740010CDSHoll B.Sozzetti A.Sahlmann J.Giacobbe P.Segransan D.Unger N.,Delisle J.B.Barbato D.Lattanzi M.G.Morbidelli R.Sosnowska D.2026-07-01T14:00:39Z2023-06-16T12:26:04ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmultiple-starsradial-velocityvisible-astronomyAstrometric discovery of sub-stellar mass companions orbiting stars is exceedingly hard due to the required sub-milliarcsecond precision, limiting the application of this technique to only a few instruments on a target-per-target basis as well as the global astrometry space missions Hipparcos and Gaia. The third Gaia data release includes the first Gaia astrometric orbital solutions, whose sensitivity in terms of estimated companion mass extends down into the planetary-mass regime. We present the contribution of the 'exoplanet pipeline' to the Gaia DR3 sample of astrometric orbital solutions by describing the methods used for fitting the orbits, the identification of significant solutions, and their validation. We then present an overview of the statistical properties of the solution parameters. Using both a Markov Chain Monte Carlo and Genetic Algorithm we fit the 34 months of Gaia DR3 astrometric time series with a single Keplerian astrometric-orbit model. Verification and validation steps are taken using significance tests, internal consistency checks using the Gaia radial velocity measurements (when available), as well as literature radial velocity and astrometric data, leading to a subset of candidates that are labelled as 'validated'. We determined astrometric-orbit solutions for 1162 sources and 198 solutions have been assigned the 'validated' label. Precise companion mass estimates are presented elsewhere. From internal and external verification and validation we estimate the level of spurious/incorrect solutions in our sample to be of the order of ~5-10% in our non-'validated' candidate samples. We demonstrate that Gaia is able to confirm and sometimes refine known orbital companion orbits as well as identify new candidates, providing us with a positive outlook of the expected harvest from the full mission data in future data releases.2023A&A...674A..10Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/674/A10CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/674/A10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/674/A10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/674/A10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/674/A10https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/674/A10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/674/A10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/674/A10/sources (List of sources with radial velocity time series)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/674/A10/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/674/A10/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/674/A10/sources?GETtext/xml+votable180.050000true231.346-46.642750.005555555555555556Cone search capability for table J/A+A/674/A10/refsols (Reference solution table)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/674/A10/refsols?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/674/A10/refsols?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/674/A10/refsols?GETtext/xml+votable180.050000true284.539575618.43397940.0055555555555555566/763 1890 1964 2014 2034 2247 2912 3004 3028 3649 4241 4289 4528 4762 4867 5154 5596 5663 5858 6078 6123 6207 6629 7208 7354 7586 8115 8398 8635 8700 8787 9194 9274 9365 9579 9958 10207 10548 10854 10867 11142 11326 11478 11716 12047 12168 12889 13538 13634 14275 14463 14607 14750 15159 15358 15363 15526 15691 16157 16339 16823 16841 17025 17274 18496 18708 18839 19740 20206 20492 20525 20530 21198 21518 21772 22140 22570 23306 23511 25229 25360 25435 25601 25766 25854 26174 26318 26651 26657 27814 27861 27975 28865 29371 30219 30227 30527 30708 30939 31160 32097 32158 32288 32345 32378 32459 32643 32664 33045 33158 33568 33717 33742 33774 33923 34107 34183 34274 34281 34314 34322 34338 34830 34955 34968 35116 35166 35173 35268 35333 35362 35485 35624 35819 35852 35994 36139 36213 37095 37207 37586 37616 37704 38093 38311 38592 38792 39011 39103 39185 39246 39269 39323 39403 39405 39419 39527 39538 39674 40000 40012 40115 40200 40574 41272 41508 41607 41675 41938 42217 42333 42357 42618 42625 42758 43168 43177 43558 43756 44459 44514 45010 45090 45123 45291 45474 45624 45820 46116 46268 46363 46484 46959 47121 47234 47335 47453 47502 47663 48163 48366 48514 48837 49125https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/674/A10?format=asciiOpticaldefaultJ/A+A/674/A10/sourcesList of sources with radial velocity time seriesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharRAJ2000Simbad Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad Declination (J2000)pos.eq.dec;meta.mainVCShow the Radial Velocity curvesmeta.ref.urlcharFileNameName of the file with RV data in subdirectory rvmeta.id;meta.filecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/674/A10/refsolsReference solution tablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharGaiaDR3Gaia DR3 source_idmeta.id;meta.mainNSSmodelNSS solution type (1)meta.notecharPerl? Reference perioddtime.perioddoublenullablee_Perl? Uncertainty of reference perioddstat.errordoublenullablePerOur perioddtime.perioddoublee_PerUncertainty of our perioddstat.errordoubleeccl? Reference eccentricitysrc.orbital.eccentricitydoublenullablee_eccl? Uncertainty of reference eccentricitystat.errordoublenullableeccOur eccentricitysrc.orbital.eccentricitydoublee_eccUncertainty of our eccentricitystat.errordoublepseu-m-idx[0/2] Our companion pseudo mass index (2)spect.indexintNameTarget common name resolvable in Simbadmeta.idcharRefReference/description of reference datameta.ref;pos.framecharn_RefAdditional notes related to reference (data)meta.notechar_RAPositions from Gaia DR3 (Cat. I/355) (right ascension part)degpos.eq.ra;meta.main_DEPositions from Gaia DR3 (Cat. I/355) (declination part)degpos.eq.dec;meta.main