J/MNRAS/492/3241ivo://CDS.VizieR/J/MNRAS/492/3241doi:10.26093/cds/vizier.74923241CDSVenn K.A.Kielty C.L.Sestito F.Starkenburg E.Martin N.Aguado D.S.,Arentsen A.Bonifacio P.Caffau E.Hill V.Jablonka P.Lardo C.,Mashonkina L.Navarro J.F.Sneden C.Thomas G.Youakim K.,Gonzalez-Hernandez J.I.Sanchez Janssen R.Carlberg R.Malhan K.2025-02-20T20:15:54Z2023-06-12T15:20:45ZCDS support team

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

cds-question@unistra.frchemically-peculiar-starspopulation-ii-starschemical-abundancesradial-velocityproper-motionsvisible-astronomysloan-photometryspectroscopyA chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT high-resolution ESPaDOnS spectroscopy. We have discovered 28 new bright (V<15) stars with [Fe/H]<-2.5 and 5 with [Fe/H]<-3.0 for success rates of 40 (28/70) and 19 per cent (5/27), respectively. A detailed model atmosphere analysis is carried out for the 28 new metal-poor stars. Stellar parameters were determined from SDSS photometric colours, Gaia DR2 parallaxes, MESA/MIST stellar isochrones, and the initial Pristine survey metallicities, following a Bayesian inference method. Chemical abundances are determined for 10 elements (Na, Mg, Ca, Sc, Ti, Cr, Fe, Ni, Y, and Ba). Most stars show chemical abundance patterns that are similar to the normal metal-poor stars in the Galactic halo; however, we also report the discoveries of a new r-process-rich star, a new CEMP-s candidate with [Y/Ba]>0, and a metal-poor star with very low [Mg/Fe]. The kinematics and orbits for all of the highly probable metal-poor candidates are determined by combining our precision radial velocities with Gaia DR2 proper motions. Some stars show unusual kinematics for their chemistries, including planar orbits, unbound orbits, and highly elliptical orbits that plunge deeply into the Galactic bulge (R_peri_<0.5kpc); also, eight stars have orbital energies and actions consistent with the Gaia-Enceladus accretion event. This paper contributes to our understanding of the complex chemo-dynamics of the metal-poor Galaxy, and increases the number of known bright metal-poor stars available for detailed nucleosynthetic studies.2020MNRAS.492.3241Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/492/3241CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/492/3241https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/492/3241http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/492/3241https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/492/3241https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/492/3241http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/492/3241GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/492/3241/table1 (Metal-poor targets (115) from the original Pristine survey footprint)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3241/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3241/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3241/table1?GETtext/xml+votable180.050000true180.22069.56830.005555555555555556Cone search capability for table J/MNRAS/492/3241/table2 (Gaia DR2 parallaxes, and the derived distances, temperatures, and surface gravities from the Bayesian inference method)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3241/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3241/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3241/table2?GETtext/xml+votable180.050000true180.22069.56830.005555555555555556Cone search capability for table J/MNRAS/492/3241/table4 (Iron-group and heavy element abundances in the new 28 metal-poor stars and our analysis of HD122563)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3241/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3241/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3241/table4?GETtext/xml+votable180.050000true180.22069.56830.005555555555555556Cone search capability for table J/MNRAS/492/3241/table5 (Light element abundances in the new 28 metal-poor stars and our analysis of HD122563)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3241/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3241/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3241/table5?GETtext/xml+votable180.050000true180.22069.56830.005555555555555556Cone search capability for table J/MNRAS/492/3241/table6 (Total systematic errors per element species due to the stellar parameters (T, logg, [Fe/H]), added in quadrature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3241/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3241/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3241/table6?GETtext/xml+votable180.050000true180.22069.56830.005555555555555556Cone search capability for table J/MNRAS/492/3241/tablea1 (Orbit and Action parameters for the 70 metal-poor candidates from the Pristine survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3241/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3241/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3241/tablea1?GETtext/xml+votable180.050000true180.22069.56830.0055555555555555565/8074 6/8259 8274 8276 8278 8289 8292 8295 8329 8359 8364 8392 8448-8449 8459 8468 8475 8724 8727 8731 8733 8736 8745 8749-8750 8752 26034 26036 26047 26102-26103 26111 26284 26366 26425 26430 26448 26455 26457 26460 26462 26470 26478 26510 26513 26516 26518 26530 26543 26548 26551 26553 26573-26574 26579 26589 26595 26599 27649 27652 27661 27666 27670 27703 27724 27730-27731 27754 27844 27859 27864 27912 27918 27925 27934 27938 27953 27970 31397-31399 31406 31439 31470-31471 31487 31538 31543 31546 31582 31585 31604 31610-31611 31614 31635-31636 31653 31655 31658-31659 31689 31703 31707 31716 32385-32386https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/492/3241?format=asciiOpticaldefaultJ/MNRAS/492/3241/table1Metal-poor targets (115) from the original Pristine survey footprintSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainflag[abcd] Flag on the target (G2)meta.code.errorcharVmagV magnitude converted from the SDSS photometrymagphot.mag;em.opt.VfloatImagI magnitude converted from the SDSS photometrymagphot.mag;em.opt.IfloatE(B-V)Reddening from Schlegel, Finkbeiner & Davis 1998ApJ...500..525Smagphot.color.excessfloatCaHKmag? Dereddened Pristine CaHK magnitudemagphot.mag;em.optfloatnullableumagDereddened SDSS u-band magnitudemagphot.mag;em.opt.UfloatgmagDereddened SDSS g-band magnitudemagphot.mag;em.opt.BfloatrmagDereddened SDSS r-band magnitudemagphot.mag;em.opt.RfloatimagDereddened SDSS i-band magnitudemagphot.mag;em.opt.IfloatTsdss? SDSS colour temperatureKphys.temperature.effectivefloatnullablee_Tsdss? Error on TsdssKstat.errorfloatnullable[Fe/H]Fe/H Pristine metallicityphys.abund.Fefloate_[Fe/H]? Error on [Fe/H]stat.error;phys.abund.FefloatnullableCommentCFHT program labelmeta.notecharJ/MNRAS/492/3241/table2Gaia DR2 parallaxes, and the derived distances, temperatures, and surface gravities from the Bayesian inference methodrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainflag[abcd] Flag on the target (G2)meta.code.errorcharplxGaia DR2 parallaxmaspos.parallax.trigfloate_plxError on plxmasstat.error;pos.parallaxfloatDistDistance derived from the Bayesian inference methodkpcpos.distancefloate_DistError on Distkpcstat.errorfloatTTemperature derived from the Bayesian inference methodKphys.temperaturefloate_TError on TKstat.errorfloatloggSurface gravity derived from the Bayesian inference methodlog(cm.s**-2)phys.gravityfloate_loggError on logglog(cm.s**-2)stat.errorfloatRVRadial velocity (1)km/sphys.veloc;pos.heliocentricfloate_RVError on RVkm/sstat.errorfloatlogFeI? FeI abundance from the 'Quick Six' analysisphys.abundfloatnullablelogFeIIFeII abundance from the 'Quick Six' analysisphys.abundfloat[Fe/H]Fe/H abundance ratio from the 'Quick Six' analysisphys.abund.FefloatNNumber of Fe lines usedmeta.numberintCommentComments (2)meta.notecharJ/MNRAS/492/3241/table4Iron-group and heavy element abundances in the new 28 metal-poor stars and our analysis of HD122563logFeIIFeII abundancephys.abundfloate_logFeII? Error on logFeIIstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainNameStar name (G3)meta.id;meta.mainchar[Fe/H]Fe/H abundance ratio (1)phys.abund.Fe;arith.ratiofloate_[Fe/H]Error on [Fe/H]stat.error;phys.abund.FefloatlogFeIFeI abundancephys.abundfloate_logFeIError on logFeIstat.errorfloato_logFeINumber of lines used to determine logFeImeta.numberintl_logFeIILimit flag on logFeIImeta.code.errorcharo_logFeII? Number of lines used to determine logFeIImeta.numberintnullablel_[Cr/Fe]Limit flag on [Cr/Fe]meta.code.error;phys.abundchar[Cr/Fe]? Cr/Fe abundance ratiophys.abund;arith.ratiofloatnullablee_[Cr/Fe]? Error on [Cr/Fe]stat.error;phys.abundfloatnullableo_[Cr/Fe]? Number of lines used to determine [Cr/Fe]meta.numberintnullablel_[Ni/Fe]Limit flag on [Ni/Fe]meta.code.error;phys.abundchar[Ni/Fe]? Ni/Fe abundance ratiophys.abund;arith.ratiofloatnullablee_[Ni/Fe]? Error on [Ni/Fe]stat.error;phys.abundfloatnullableo_[Ni/Fe]? Number of lines used to determine [Ni/Fe]meta.numberintnullablel_[Y/Fe]Limit flag on [Y/Fe]meta.code.error;phys.abundchar[Y/Fe]Y/Fe abundance ratiophys.abund;arith.ratiofloate_[Y/Fe]? Error on Y/Festat.error;phys.abundfloatnullableo_[Y/Fe]? Number of lines used to determine [Y/Fe]meta.numberintnullablel_[Ba/Fe]Limit flag on [Ba/Fe]meta.code.error;phys.abundchar[Ba/Fe]Ba/Fe abundance ratiophys.abund;arith.ratiofloate_[Ba/Fe]? Error on [Ba/Fe]stat.error;phys.abundfloatnullableo_[Ba/Fe]? Number of lines used to determine [Ba/Fe]meta.numberintnullableJ/MNRAS/492/3241/table5Light element abundances in the new 28 metal-poor stars and our analysis of HD122563l_[Na/Fe]Limit flag on [Na/Fe]phys.abundchar[Na/Fe]Na/Fe abundance ratiophys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainNameStar name (G3)meta.id;meta.mainchare_[Na/Fe]? Error on [Na/Fe]phys.abundfloatnullableo_[Na/Fe]? Number of lines used to determine [Na/Fe]phys.abundintnullable[Mg/Fe]Mg/Fe abundance ratiophys.abundfloate_[Mg/Fe]Error on [Mg/Fe]phys.abundfloato_[Mg/Fe]Number of lines used to determine [Mg/Fe]phys.abundintl_[Ca/Fe]Limit flag on [Ca/Fe]phys.abundchar[Ca/Fe]? Ca/Fe abundance ratiophys.abundfloatnullablee_[Ca/Fe]? Error on [Ca/Fe]phys.abundfloatnullableo_[Ca/Fe]? Number of lines used to determine [Ca/Fe]phys.abundintnullablel_[Sc/Fe]Limit flag on [Sc/Fe]phys.abundchar[Sc/Fe]? Sc/Fe abundance ratiophys.abundfloatnullablee_[Sc/Fe]? Error on [Sc/Fe]phys.abundfloatnullableo_[Sc/Fe]? Number of lines used to determine [Sc/Fe]phys.abundintnullable[TiI/Fe]? TiI/Fe abundance ratiophys.abundfloatnullablee_[TiI/Fe]? Error on [TiI/Fe]stat.error;phys.abundfloatnullableo_[TiI/Fe]? Number of lines used to determine [TiI/Fe]meta.numberintnullablel_[TiII/Fe]Limit flag on [TiII/Fe]meta.code.error;phys.abundchar[TiII/Fe]TiII/Fe abundance ratiophys.abundfloate_[TiII/Fe]? Error on [TiII/Fe]stat.error;phys.abundfloatnullableo_[TiII/Fe]? Number of lines used to determine [TiII/Fe]meta.numberintnullableJ/MNRAS/492/3241/table6Total systematic errors per element species due to the stellar parameters (T, logg, [Fe/H]), added in quadraturedCrI? Systematic error on CrI abundancestat.errorfloatnullabledNiI? Systematic error on NiI abundancestat.errorfloatnullabledYII? Systematic error on YII abundancestat.errorfloatnullableRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainNameStar Name (G3)meta.id;meta.mainchardFeISystematic error on FeI abundancestat.errorfloatdFeII? Systematic error on FeII abundancestat.errorfloatnullabledNaSystematic error on Na abundancestat.errorfloatdMgSystematic error on Mg abundancestat.errorfloatdCa? Systematic error on Ca abundancestat.errorfloatnullabledSc? Systematic error on Sc abundancestat.errorfloatnullabledTiI? Systematic error on TiI abundancestat.errorfloatnullabledTiII? Systematic error on TiII abundancestat.errorfloatnullabledBaII? Systematic error on BaII abundancestat.errorfloatnullableJ/MNRAS/492/3241/tablea1Orbit and Action parameters for the 70 metal-poor candidates from the Pristine surveye_RapoError on Rapokpcstat.errorfloatRperiPericentric distancekpcpos.distance;src.orbitalfloate_RperiError on Rperikpcstat.errorfloate_eccError on eccstat.errorfloatZmaxPerpendicular distance from the Galactic planekpcpos.cartesian.z;pos.galacticfloateccEccentricitysrc.orbital.eccentricityfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainpmRAProper motion in right ascensionmas/yrpos.pm;pos.eq.rafloate_pmRAError on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decfloate_pmDEError on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatUU component of space velocitykm/sphys.veloc;pos.cartesian.xdoublee_UError on Ukm/sstat.error;pos.cartesian.xfloatVV component of space velocitykm/sphys.veloc;pos.cartesian.yfloate_VError on Vkm/sstat.error;pos.cartesian.yfloatWW component of space velocitykm/sphys.veloc;pos.cartesian.zfloate_WError on Wkm/sstat.error;pos.cartesian.zfloatRapoApocentric distancekpcpos.distance;src.orbitalfloate_ZmaxError on Zmaxkpcstat.errorfloatJphiAzimuthal action parameter in solar units (1)Sunphys.angMomentumfloate_JphiError on JphiSunstat.errorfloatJzVertical action parameter in solar units (2)Sunphys.angMomentumdoublee_JzError on JzSunstat.errorfloatEOrbital energy in solar units (3)Sunphys.energyfloate_E[] Error on ESunstat.errorfloat