J/A+A/653/A160ivo://CDS.VizieR/J/A+A/653/A160doi:10.26093/cds/vizier.36530160CDSSeabroke G.M.Fabricius C.Teyssier D.Sartoretti P.Katz D.,Cropper M.Antoja T.Benson K.Smith M.Dolding C.Gosset E.,Panuzzo P.Thevenin F.Allende Prieto C.Blomme R.Guerrier A.,Huckle H.Jean-Antoine A.Haigron R.Marchal O.Baker S.Damerdji Y.,David M.Fremat Y.Janssen K.Jasniewicz G.Lobel A.Samaras N.,Plum G.Soubiran C.Vanel O.Zwitter T.Ajaj M.Caffau E.Chemin L.,Royer F.Brouillet N.Crifo F.Guy L.P.Hambly N.C.Leclerc N.,Mastrobuono-Battisti A.Viala Y.2022-12-31T10:08:17Z2022-02-08T15:01:00ZCDS support team

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

cds-question@unistra.frradial-velocityvisible-astronomyGaia's Early Third Data Release (EDR3) does not contain new radial velocities because these will be published in Gaia's full third data release (DR3), expected in the first half of 2022. To maximise the usefulness of EDR3, Gaia's second data release (DR2) sources (with radial velocities) are matched to EDR3 sources to allow their DR2 radial velocities to also be included in EDR3. This presents two considerations: (i) a list of 70365 sources with potentially contaminated DR2 radial velocities has been published; and (ii) EDR3 is based on a new astrometric solution and a new source list, which means sources in DR2 may not be in EDR3. The two aims of this work are: (i) investigate the list in order to improve the DR2 radial velocities being included in EDR3 and to avoid false-positive hypervelocity candidates; and (ii) match the DR2 sources (with radial velocities) to EDR3 sources. Methods. Thetwo methods of this work are: (i) unpublished, preliminary DR3 radial velocities of sources on the list, and high-velocity stars not on the list, are compared with their DR2 radial velocities to identify and remove contaminated DR2 radial velocities from EDR3; and (ii) proper motions and epoch position propagation is used to attempt to match all sources with radial velocities in DR2 to EDR3 sources. The comparison of DR2 and DR3 radial velocities is used to resolve match ambiguities. EDR3 contains 7209831 sources with a DR2 radial velocity, which is 99.8% of sources with a radial velocity in DR2 (7224631). 14800 radial velocities from DR2 are not propagated to any EDR3 sources because (i) 3871 from the list are found to either not have a DR3 radial velocity or it differs significantly from its DR2 value, and five high-velocity stars not on the list are confirmed to have contaminated radial velocities, in one case because of contamination from the non-overlapping Radial Velocity Spectrometer windows of a nearby, bright star; and (ii) 10924 DR2 sources could not be satisfactorily matched to any EDR3 sources, so their DR2 radial velocities are also missing from EDR3. The reliability of radial velocities in EDR3 has improved compared to DR2 because the update removes a small fraction of erroneous radial velocities (0.05% of DR2 radial velocities and 5.5% of the list). Lessons learnt from EDR3 (e.g. bright star contamination) will improve the radial velocities in future Gaia data releases. The main reason for radial velocities from DR2 not propagating to EDR3 is not related to DR2 radial velocity quality. It is because the DR2 astrometry is based on one component of close binary pairs, while EDR3 astrometry is based on the other component, which prevents these sources from being unambiguously matched.2021A&A...653A.160Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/653/A160CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/653/A160https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/653/A160http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/653/A160https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/653/A160https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/653/A160http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/653/A160GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/653/A160/tableb1 (EDR3 status of high-velocity stars in the negative tail of DR2's radial velocity distribution)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/653/A160/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/653/A160/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/653/A160/tableb1?GETtext/xml+votable180.050000true242.4710728-52.80653310.005555555555555556Cone search capability for table J/A+A/653/A160/tableb2 (EDR3 status of high-velocity stars in the positive tail of DR2's radial velocity distribution)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/653/A160/tableb2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/653/A160/tableb2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/653/A160/tableb2?GETtext/xml+votable180.050000true281.3235006-7.53669170.0055555555555555566/6677 9488 9495 12310 12706 12713 12832 12859 12891 12973 12987 13209 13881 14175 14340 14416 14451 14506 15103 15619 15996 20758 24143 26663 28787 28790 28829 28835 28868 28871 28886 28889 28966 29077 29093 29097 29120 29138 29153-29154 29172 29261 29476 29494 29521 29530 30210-30211 30214 30307 30321 30333 30493 30513 30531 30658 30696 32005 32087 32196 32582 32599 33103 37142 37172 37328 37701 37711 37840 37882 38029 38047 38073 38245 38468 38586 39190 39397 39968 40174 41407 41523 41584 41681 41691 41721 41768 41808 41869 42143 42150 42153 42158 42181 42199 42233 42285 42301 42310 42322 42341 42346 42377 42386 42396 42433 42474 42487 42628 42768 43013 43184 43204 43352-43353 43690 45605https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/653/A160?format=asciiOpticaldefaultJ/A+A/653/A160/tableb1EDR3 status of high-velocity stars in the negative tail of DR2's radial velocity distributionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaEDR3Gaia EDR3 source IDmeta.id;meta.mainn_GaiaEDR3[a] Note (1)meta.notecharRVGaia DR2 radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVGaia DR2 radial velocity errorkm/sstat.errorfloatNtransDR2 number of transitsmeta.numberintEDR3[Yes/No ] Yes: DR2 RV is in EDR3 or No: DR2 RV is not in EDR3meta.codecharB19[Yes/No ] Yes: in BOUBERT et al., (2019MNRAS.486.2618B) listmeta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Gaia EDR3 (right ascension part)degpos.eq.ra;meta.main_DEPositions from Gaia EDR3 (declination part)degpos.eq.dec;meta.mainJ/A+A/653/A160/tableb2EDR3 status of high-velocity stars in the positive tail of DR2's radial velocity distributionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaEDR3Gaia EDR3 source IDmeta.id;meta.mainn_GaiaEDR3[a] Note (1)meta.notecharRVGaia DR2 radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVGaia DR2 radial velocity errorkm/sstat.errorfloatNtransDR2 number of transitsmeta.numberintEDR3[Yes/No ] Yes: DR2 RV is in EDR3 or No: DR2 RV is not in EDR3meta.codecharB19[Yes/No ] Yes: in BOUBERT et al., (2019MNRAS.486.2618B) listmeta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Gaia EDR3 (right ascension part)degpos.eq.ra;meta.main_DEPositions from Gaia EDR3 (declination part)degpos.eq.dec;meta.main