J/A+A/567/A55ivo://CDS.VizieR/J/A+A/567/A55doi:10.26093/cds/vizier.35670055CDSSpina L.Randich S.Palla F.Sacco G.G.Magrini L.Franciosini E.,Morbidelli L.Prisinzano L.Alfaro E.J.Biazzo K.Frasca A.,Gonzalez Hernandez J.I.Sousa S.G.Adibekyan V.Delgado-Mena E.,Montes D.Tabernero H.Klutsch A.Gilmore G.Feltzing S.,Jeffries R.D.Micela G.Vallenari A.Bensby T.Bragaglia A.,Flaccomio E.Koposov S.Lanzafame A.C.Pancino E.Recio-Blanco A.,Smiljanic R.Costado M.T.Damiani F.Hill V.Hourihane A.Jofre P.,de Laverny P.Masseron T.Worley C.2015-09-22T15:18:15Z2014-07-10T11:05:15ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsmetallicityeffective-temperatureline-intensitiesradial-velocityspectroscopyKnowledge of the abundance distribution of star forming regions and young clusters is critical to investigate a variety of issues, from triggered star formation and chemical enrichment by nearby supernova explosions to the ability to form planetary systems. In spite of this, detailed abundance studies are currently available for relatively few regions. In this context, we present the analysis of the metallicity of the Gamma Velorum cluster, based on the products distributed in the first internal release of the Gaia-ESO Survey. The Gamma Velorum candidate members have been observed with FLAMES, using both UVES and Giraffe, depending on the target brightness and spectral type. In order to derive a solid metallicity determination for the cluster, membership of the observed stars must be first assessed. To this aim, we use several membership criteria including radial velocities, surface gravity estimates, and the detection of the photospheric lithium line. Out of the 80 targets observed with UVES, we identify 14 high-probability members. We find that the metallicity of the cluster is slightly sub-solar, with a mean [Fe/H]=-0.057+/-0.018dex. Although J08095427-4721419 is one of the high-probability members, its metallicity is significantly larger than the cluster average. We speculate about its origin as the result of recent accretion episodes of rocky bodies of about 60 Msun hydrogen-depleted material from the circumstellar disc.2014A&A...567A..55Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/567/A55CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/567/A55https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/567/A55http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/567/A55https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/567/A55https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/567/A55http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/567/A55GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/567/A55/uves (Stellar parameters of the 80 UVES targets (table4) and quantities used for the membership analysis (table5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/567/A55/uves?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/567/A55/uves?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/567/A55/uves?GETtext/xml+votable180.050000true121.6506667-47.80572220.005555555555555556Cone search capability for table J/A+A/567/A55/table7 (Stellar parameters of the 208 GIRAFFE members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/567/A55/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/567/A55/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/567/A55/table7?GETtext/xml+votable180.050000true121.669875-47.612250.0055555555555555566/39194 39205 39216-39218https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/567/A55?format=asciiOpticaldefaultJ/A+A/567/A55/uvesStellar parameters of the 80 UVES targets (table4) and quantities used for the membership analysis (table5)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/80] Identification numbermeta.idintCNameTarget Name in the Gaia-ESO archive, HHMMSSss+DDMMSSsmeta.id;meta.maincharprimaryNNumber of other observations of this star (tables 6, 7meta.numberintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? Standard error on effective temperatureKstat.error;phys.temperature.effectiveintnullablelogg? Logarithm of gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? Standard error on the logarithm of gravitylog(cm.s**-2)stat.errorfloatnullable[Fe/H]? Iron abundance relative to the Sunlog(Sun)phys.abund.Fefloatnullablee_[Fe/H]? Standard error on iron abundancelog(Sun)stat.error;phys.abund.FefloatnullableMDetails about this star by Jeffries et al. 2009 (J/MNRAS/393/538); 2014 (J/A+A/563/A94)meta.ref.urlintnullableHRV? Mean heliocentric radial velocity (1)km/sspect.dopplerVeloc;stat.meanfloatnullablel_EWLiLimit flag on EWLimeta.code.errorcharEWLiEquivalent width of the 6708{AA} Li line0.1nmspect.line.eqWidthinte_EWLi? Standard error on EWLi0.1nmstat.errorintnullable(B-V)0Derredenned B-V colour index (Johnson) (2)magphot.color;em.opt.B;em.opt.VfloatVMAG0Absolute derredenned V magnitude (Johnson) (2)magphot.mag;em.opt.VfloatMb1[Y N SB2] Flag on membership based on RV (3)meta.code.membercharMb2[Y/N] Flag on membership based on logg (3)meta.code.membercharMb3[Y N HCM] Flag on membership based on EWLi (3)meta.code.membercharMb4[Y/N] Flag on membership based on position in color-magnitude diagram (3)meta.code.membercharMb[M N HCM ?] Flag on final membership (4)meta.code.membercharJ/A+A/567/A55/table6Stellar parameters of the 39 stars targeted by both UVES and GIRAFFErecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCNameTarget Name in the Gaia-ESO archive, HHMMSSss+DDMMSSsmeta.id;meta.maincharTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? Standard error on effective temperatureKstat.error;phys.temperature.effectiveintnullablelogg? Logarithm of gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? Standard error on the logarithm of gravitylog(cm.s**-2)stat.errorfloatnullable[Fe/H]? Iron abundance relative to the Sunlog(Sun)phys.abund.Fefloatnullablee_[Fe/H]? Standard error on iron abundancelog(Sun)stat.error;phys.abund.FefloatnullableJ/A+A/567/A55/table7Stellar parameters of the 208 GIRAFFE membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCNameTarget Name in the Gaia-ESO archive, HHMMSSss+DDMMSSsmeta.id;meta.maincharNNumber of observations of this star in tables 4--7meta.numberintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? Standard error on effective temperatureKstat.error;phys.temperature.effectiveintnullablelogg? Logarithm of gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? Standard error on the logarithm of gravitylog(cm.s**-2)stat.errorfloatnullable[Fe/H]? Iron abundance relative to the Sunlog(Sun)phys.abund.Fefloatnullablee_[Fe/H]? Standard error on iron abundancelog(Sun)stat.error;phys.abund.FefloatnullableMDetails about this star by Jeffries et al. 2009 (J/MNRAS/393/538); 2014 (J/A+A/563/A94)meta.ref.urlintnullable