J/MNRAS/487/3797ivo://CDS.VizieR/J/MNRAS/487/3797doi:10.26093/cds/vizier.74873797CDSBonifacio P.Caffau E.Sestito F.Lardo C.Martin N.F.Starkenburg E.,Sbordone L.Francois P.Jablonka P.Henden A.A.Salvadori S.,Gonzalez Hernandez J.I.Aguado D.S.Hill V.Venn K.Navarro J.F.,Arentsen A.Sanchez-Janssen R.Carlberg R.2024-08-19T20:19:05Z2023-01-16T15:16:03ZCDS support team

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

cds-question@unistra.frchemical-abundancesstellar-atmospherespopulation-ii-starsradial-velocityvisible-astronomyWith the aim of probing the properties of the bright end of the Pristine survey and its effectiveness in selecting metal-poor stars, we selected a sample of bright candidate metal-poor stars combining Pristine CaHK photometry with APASS gi photometry, before the Gaia second data release became available. These stars were observed with the SOPHIE spectrograph at the 1.93m telescope of Observatoire de Haute Provence and we used photometry and parallaxes from Gaia DR2 to derive their atmospheric parameters. Chemical abundances were determined from the spectra for 40 stars of the sample. Eight stars were confirmed to be very metal-poor ([Fe/H]<-2.0), as expected from the photometric estimate. No star was found with [Fe/H]<-3.0, although for nine stars the photometric estimate was below this value. Three multiple systems are identified from their multipeaked cross-correlation functions. Two metal-poor stars with [Fe/H]~-1.0 have an age estimate of about 4Gyr. Accretion from a satellite galaxy is a possible explanation for these 'young metal-poor stars', but they could also be field blue stragglers. Galactic orbits for our sample of stars allowed us to divide them into three classes that we label 'Halo', 'Thick', and 'Thin' and tentatively identify as halo, thick disc, and thin disc. We present a new method for deriving photometric metallicities, effective temperatures, and surface gravities by combining Gaia parallaxes, photometry, and Pristine CaHK photometry. Comparison with spectroscopic metallicities shows a very good agreement and suggests that we can further improve the efficiency of Pristine CaHK in selecting metal-poor stars.2019MNRAS.487.3797Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/487/3797CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/487/3797https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/487/3797http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/487/3797https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/487/3797https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/487/3797http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/487/3797GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/487/3797/table2 (Stellar parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/3797/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/3797/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/3797/table2?GETtext/xml+votable180.050000true110.04595843.0522220.0055555555555555566/6570 6737 6749 6913 6915-6916 6919 6928 8272 8371 8480 8496 8712 8729 8741 26023 26489 26504 26542 26603 27858 27864 27871 27889 27892 27911 27948 27953 28032 28042 31410 31472 31477 31483 31618 31627 31719https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/487/3797?format=asciiOpticaldefaultJ/MNRAS/487/3797/table4Chemical abundances of calcium to manganeseNameStar name (Pristine_DDD.dddd+DD.dddd)meta.id;meta.maincharA(Ca)Calcium abundancephys.abundfloate_A(Ca)? Error on A(Ca) (G1)stat.errorfloatnullableA(Sc)? Scandium abundancephys.abundfloatnullablee_A(Sc)? Error on A(Sc) (G1)stat.errorfloatnullableA(TiI)? Titanium Ti I abundancephys.abundfloatnullablee_A(TiI)? Error on A(TiI) (G1)stat.errorfloatnullableA(TiII)? Titanium Ti II abundancephys.abundfloatnullablee_A(TiII)? Error on A(TiII) (G1)stat.errorfloatnullableA(V)? Vanadium abundancephys.abundfloatnullablee_A(V)? Error on A(V) (G1)stat.errorfloatnullableA(CrI)? Chromium Cr I abundancephys.abundfloatnullablee_A(CrI)? Error on A(CrI) (G1)stat.errorfloatnullableA(CrII)? Chromium Cr II abundancephys.abundfloatnullablee_A(CrII)? Error on A(CrII) (G1)stat.errorfloatnullableA(Mn)? Manganese abundancephys.abundfloatnullablee_A(Mn)? Error on (Mn) (G1)stat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/MNRAS/487/3797/table1Measured radial velocities of Pristine_113.6058+45.8841BJDBarycentric Julian datedtime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRV1? Radial velocity of the first peakkm/sspect.dopplerVeloc;stat.maxfloatnullableRV2? Radial velocity of the second peakkm/sspect.dopplerVeloc;stat.maxfloatnullableRVMean radial velocity estimated by fitting a single gaussiankm/sphys.veloc;pos.heliocentricfloatCommentShape of the cross correlation function (Single peak or Double peak)meta.notecharJ/MNRAS/487/3797/table2Stellar parametersSimbadSimbad column added by the CDSmeta.ref.urlcharDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV-band magnitudemagphot.mag;em.opt.VfloatRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullableTeff? Effective temperatureKphys.temperature.effectiveintnullablelogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullablevt? Microturbulence velocitykm/sphys.veloc.microTurbfloatnullable[Fe/H]? Fe to hydrogen abundance ratiophys.abund.Fefloatnullablee_[Fe/H]? Error on [Fe/H] (G1)stat.error;phys.abund.FefloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMoreLink to abundances and orbital parametersmeta.ref.urlcharNameStar name (Pristine_DDD.dddd+DD.dddd)meta.id;meta.maincharprimaryf_NameFlag on Name (1)meta.codecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainJ/MNRAS/487/3797/table3Chemical abundances of iron, sodium, magnesium, aluminium, silicon, and sulphurNameStar name (Pristine_DDD.dddd+DD.dddd)meta.id;meta.maincharA(FeI)FeI to hydrogen abundance ratiophys.abund.Fefloate_A(FeI)Error on A(FeI) (G1)stat.errorfloatA(FeII)FeII to hydrogen abundance ratiophys.abund.Fefloate_A(FeII)? Error on A(FeII) (G1)stat.errorfloatnullableA(Na)? Sodium abundancephys.abundfloatnullablee_A(Na)? Error on A(Na) (G1)stat.errorfloatnullableA(Mg)? Magnesium abundancephys.abundfloatnullablee_A(Mg)? Error on A(Mg) (G1)stat.errorfloatnullableA(Al)? Aluminium abundancephys.abundfloatnullableA(SiI)? Silicon Si I abundancephys.abundfloatnullablee_A(SiI)? Error on A(SiI) (G1)stat.errorfloatnullableA(SiII)? Silicon Si II abundancephys.abundfloatnullablee_A(SiII)? Error on A(SiII) (G1)stat.errorfloatnullableA(S)? Sulphur abundancephys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/MNRAS/487/3797/table5Chemical abundances of cobalt to bariumA(Co)? Cobalt abundancephys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (Pristine_DDD.dddd+DD.dddd)meta.id;meta.maincharA(Ni)? Nickel abundancephys.abundfloatnullablee_A(Ni)? Error on A(Ni) (G1)stat.errorfloatnullableA(Cu)? Copper abundancephys.abundfloatnullablee_A(Cu)? Error on A(Cu) (G1)stat.errorfloatnullableA(Zn)? Zinc abundancephys.abundfloatnullablee_A(Zn)? Error on A(Zn) (G1)stat.errorfloatnullableA(Sr)? Strontium abundancephys.abundfloatnullablee_A(Sr)? Error on A(Sr) (G1)stat.errorfloatnullableA(Y)? Yttrium abundancephys.abundfloatnullablee_A(Y)? Error on A(Y) (G1)stat.errorfloatnullableA(Zr)? Zirconium abundancephys.abundfloatnullableA(Ba)? Barium abundancephys.abundfloatnullablee_A(Ba)? Error on A(Ba) (G1)stat.errorfloatnullableJ/MNRAS/487/3797/table7Carbon abundances for the cool starsA(C)Carbon abundancephys.abundfloatNameStar name (Pristine_DDD.dddd+DD.dddd)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/MNRAS/487/3797/tablea1Inferred orbital parameters of the stars in the (space velocities, apocentre and pericentre distances)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (Pristine_DDD.dddd+DD.dddd)meta.id;meta.maincharULSRSpace velocity U with respect to the Local Standard of Restkm/sphys.veloc;pos.cartesian.xfloatE_ULSRUpper error on Ukm/sstat.error;stat.maxfloate_ULSRLower error on Ukm/sstat.errorfloatVLSRSpace velocity V with respect to the Local Standard of Restkm/sphys.veloc;pos.cartesian.yfloatE_VLSRUpper error on Vkm/sstat.error;stat.maxfloate_VLSRLower error on Vkm/sstat.error;phys.veloc;pos.lsrfloatWLSRSpace velocity W with respect to the Local Standard of Restkm/sphys.veloc;pos.cartesian.zfloatE_WLSRUpper error on Wkm/sstat.error;stat.maxfloate_WLSRLower error on Wkm/sstat.errorfloatApoApocentre distance in the galactocentric framekpcpos.distance;pos.galactocentricfloatE_ApoUpper error on Apokpcstat.error;stat.maxfloate_ApoLower error on Apokpcstat.errorfloatPeriPericentre distance in the galactocentric framekpcpos.distance;pos.galactocentricfloatE_PeriUpper error on Perikpcstat.error;stat.maxfloate_PeriLower error on Perikpcstat.errorfloatJ/MNRAS/487/3797/tablea2Inferred orbital parameters of the stars in the (eccentricities, energies, actions and maximum heights)JrRadial component of the actionkpc.km/sarith.grad;phys.velocfloatE_JrUpper error on Jrkpc.km/sstat.error;stat.maxfloate_JrLower error on Jrkpc.km/sstat.errorfloatJzVertical component of the actionkpc.km/sarith.grad;phys.velocfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (Pristine_DDD.dddd+DD.dddd)meta.id;meta.mainchareccEccentricity of the orbit (1)src.orbital.eccentricityfloatE_eccUpper error on eccstat.error;stat.maxfloate_eccLower error on eccstat.errorfloatEEnergy of the orbitkm**2.s**-2phys.energydoubleE_EUpper error on Ekm**2.s**-2stat.error;stat.maxfloate_ELower error on Ekm**2.s**-2stat.errorfloatJphiRotational component of the actionkpc.km/sarith.grad;phys.velocfloatE_JphiUpper error on Jphikpc.km/sstat.error;stat.maxfloate_JphiLower error on Jphikpc.km/sstat.errorfloatE_JzUpper error on Jzkpc.km/sstat.error;stat.maxfloate_JzLower error on Jzkpc.km/sstat.errorfloatzmaxMaximum height of the orbit above the galactic planekpcsrc.orbitalfloatE_zmaxUpper error on zmaxkpcstat.error;stat.maxfloate_zmaxLower error on zmaxkpcstat.errorfloatOrbitType of the orbit (Thin, Thick, Halo)src.classchar