J/AJ/155/256ivo://CDS.VizieR/J/AJ/155/256doi:10.26093/cds/vizier.51550256CDSPlacco V.M.Beers T.C.Santucci R.M.Chaname J.Sepulveda M.P.,Coronado J.Points S.D.Kaleida C.C.Rossi S.Kordopatis G.Lee Y.S.,Matijevic G.Frebel A.Hansen T.T.Holmbeck E.M.Rasmussen K.C.,Roederer I.U.Sakari C.M.Whitten D.D.2020-01-31T11:48:30Z2019-01-15T08:27:22ZCDS support team

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

cds-question@unistra.frhalo-starscarbon-starschemically-peculiar-starsspectroscopyradial-velocityeffective-temperaturechemical-abundancesproper-motionsvisible-astronomytrigonometric-parallaxWe present results from a medium-resolution (R~2000) spectroscopic follow-up campaign of 1694 bright (V<13.5), very metal-poor star candidates from the RAdial Velocity Experiment (RAVE). Initial selection of the low-metallicity targets was based on the stellar parameters published in RAVE Data Releases 4 (Cat. III/272) and 5 (Cat. III/279). Follow up was accomplished with the Gemini-N and Gemini-S, the ESO/NTT, the KPNO/Mayall, and the SOAR telescopes. The wavelength coverage for most of the observed spectra allows for the determination of carbon and {alpha}-element abundances, which are crucial for considering the nature and frequency of the carbon-enhanced metal-poor (CEMP) stars in this sample. We find that 88% of the observed stars have [Fe/H]=< -1.0, 61% have [Fe/H]=< -2.0, and 3% have [Fe/H]=< -3.0 (with four stars at [Fe/H]=< -3.5). There are 306 CEMP star candidates in this sample, and we identify 169 CEMP Group I, 131 CEMP Group II, and 6 CEMP Group III stars from the A(C) versus [Fe/H] diagram. Inspection of the [{alpha}/C] abundance ratios reveals that five of the CEMP Group II stars can be classified as "mono-enriched second-generation" stars. Gaia DR1 matches were found for 734 stars, and we show that transverse velocities can be used as a confirmatory selection criteria for low-metallicity candidates. Selected stars from our validated list are being followed-up with high-resolution spectroscopy to reveal their full chemical-abundance patterns for further studies.2018AJ....155..256Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/256CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/272 : RAVE 4th data release (Kordopatis+, 2013)I/337 : Gaia DR1 (Gaia Collaboration, 2016)III/279 : RAVE 5th data release (Kunder+, 2017)J/ApJ/658/367 : Abundances of carbon stars in Galactic halo (Komiya+, 2007)J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)J/ApJ/737/9 : RAVE spectroscopic data of stars in the thick diskJ/ApJ/762/26 : Most metal-poor stars. II. 190 Galactic halo starsJ/ApJ/794/58 : Metal-poor stars in the thick disk of the Galaxy (Beers+, 2014)J/ApJ/833/20 : Carbon-enhanced metal-poor (CEMP) star abundances (Yoon+, 2016)J/ApJ/833/119 : Distances of Gaia DR1 TGAS sources (Astraatmadja+, 2016)J/ApJ/835/81 : Bright metal-poor stars from HES Survey. II. (Beers+, 2017)J/ApJ/847/16 : NLTE spectroscopy. II. Galactic metal-poor starsJ/ApJ/852/49 : Properties of metal-poor stars in APOGEE DR13 (Hayes+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/256https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/256http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/256https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/256https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/256http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/256GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/256/sample (Observing details (table 1) , coordinates, magnitudes, color indices, and redenning estimates (table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/256/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/256/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/256/sample?GETtext/xml+votable180.050000true0.094125-13.04097220.0055555555555555565/12165 6/4298 16426 16438 16451 16508 16538 16560 16582 16766 16768 16813 16819 16824 16828 16890 16893 16901 16929 17006 17027 17032 17070 17072 17085 17091 17122 17151 17179 17181 17203 17204 17212 17234 17241 17310 17315 17326 17332 17347 17374 17420 17423 17483 17517 17572 17595 17599 17683 17695 17725 17771 17787 17811 17935 17938 17973 18439 18464 18468 18477 18508 18510 18520 18525 18534 18542 18543 18550 18566 18620 18625 18667 18683 18730 18762 18784 18816 18847 18948 18956 18957 18959 18964 18968 18979 18991 18992 19012 19049 19074 19079 19083 20480 20523 20527 20532 20536 20538 20549 20576 20584 20635 20643 20646 20670 20738 20750 20882 21034 21043 21050 21066 21083 21097 21114 21126 21157 21172 21180 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43978 43994 43996 44000 44002 44009 44024 44028 44032 44034 44035 44037 44045 44053 44075 44079 44088 44089 44137 44144 44183 44186 44189 44200 44206 44211 44213 44224 44232 44237 44238 44242 44245 44254 44266 44268 44274 44298 44329 44331 44349 44350 44398 44412 44418 44421 44423 44425 44427 44445 44447 44449 44458 44467 44472 44479 44483 44488 44493 44496 44498 44500 44505 44509 44513 44520 44521 44527 44528 44537 44542 44545 44550 44552 44570 44573 44577 44585 44591 44595 44607 44615 44618 44620 44621 44629 44632 44634 44641 44658 44683 44690 44694 44699 44710 44730 44735 44744 44754 44755 44766 44772 44774 44775 44790 44793 44797 44806 44807 44811 44816 44824 44825 44829 44834 44844 44846 44847 44852 44854 44855 44858 44862 44875 44880 44882 44884 44886 44889 44890 44892 44897 44898 44901 44912 44914 44922 44926 44935 44945 44946 44971 44977 44997 45004 45005 45007 45008 45009 45014 45015 45021 45034 45037 45041 45043 45047 45054 45072 45090 45096 45101 45131 45149 45187 45202 45207 45208 45220 45262 45277 45308 45309 45317 45340 45362 45394 45408 45418 45422 45450 45483 45496 45499 45529 45547 45586 45587 45598 45604 45612 45655 45658 45690 45694 45749 45765 45768 45770 45799 45802 45804 45807 45808 45815 45819 45822 45829 45838 45857 45863 45877 45952 45966 45968 45976 45977 45984 46003 46023 46024 46026 46040 46054 46055 46059 46068 46083 46104 46116 46156 46167 46208 46215 46223 46230 46253 46273 46284 46306 46325 46333 46389 46394 46440 46451 46476 46483 46540 46613 46632 46640 46666 46706 46722 46744 46770 46825 46827 46864 46899 46920 47009 47025 47039 47053 47084 47107 47127 47158 47159 47169 47172 47173 47181 47190 47194 47201 47206 47207 47225 47226 47309 47334 47335 47341 47342 47351 47353 47356 47357 47363 47364 47365 47375 47382 47383 47399 47400 47406 47409 47430 47431 47459 47461 47487 47515 47519 47532 47533 47536 47544 47545 47546 47564 47575 47589 47598 47601 47608 47613 47634 47638 47641 47650 47668 47673 47687 47695 47699 47706 47707 47721 47757 47776 47801 47885 47887 47894 47939 47940 47942 47955 47961 47963 47965 47988 48011 48074 48087 48101 48132 48162 48163 48168 48173 48187 48201 48209 48258 48262 48281 48289 48434 48518 48527 48545 48561 48571 48572 48603 48604 48611 48631 48645 48647 48655 48659 48674 48679 48703 48708 48735 48738 48741 48746 48750 48755 48764 48822 48824 48834 48836 48837 48839 48848 48849 48851 48854 48861 48885 48898 48901 48902 48916 48919 48926 48930 48937 48946 48949 48951 48962 48969 48980 48982 48991 48994 49001 49007 49008 49019 49027 49031 49037 49080 49081 49087 49089 49093 49096 49103 49115 49117 49121 49136 49137 49139 491461.5062136169708525e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/256?format=asciiOpticaldefaultJ/AJ/155/256/table3*Stellar parameters from RAVE DR4, RAVE DR5, RAVE-on, and the n-SSPPrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAVERAVE positional identifier (JHHMMSS.s+DDMMSS)meta.id;meta.maincharRV-DR4[-983.66/989.55]? Radial velocity from RAVE DR4km/sphys.veloc;pos.heliocentricfloatnullableTeff-DR4[3000/8000]? Stellar effective temperature from RAVE DR4Kphys.temperature.effectiveintnullablelogg-DR4[0.01/5.5]? Stellar surface gravity from RAVE DR4log(cm.s**-2)phys.gravityfloatnullable[Fe/H]-DR4[-5.29/0.26]? Metallicity from RAVE DR4phys.abund.FefloatnullableRV-DR5[-983.66/989.55]? Radial velocity from RAVE DR5km/sphys.veloc;pos.heliocentricfloatnullableTeff-DR5[3086/7881]? Stellar effective temperature from RAVE DR5Kphys.temperature.effectiveintnullableTeff-DR5-IR[3485/9503]? Stellar effective temperature from IR flux method, from RAVE DR5Kphys.temperature.effectiveintnullablelogg-DR5[0.52/5.18]? Stellar surface gravity from RAVE DR5log(cm.s**-2)phys.gravityfloatnullable[Fe/H]-DR5[-9.9/0.49]? Metallicity from RAVE DR5phys.abund.FefloatnullableRV-on[-983.66/989.55]? Radial velocity from RAVE-onkm/sphys.veloc;pos.heliocentricfloatnullableTeff-on[3579/7701]? Stellar effective temperature from RAVE-onKphys.temperature.effectiveintnullablelogg-on[-0.22/4.96]? Stellar surface gravity from RAVE-onlog(cm.s**-2)phys.gravityfloatnullable[Fe/H]-on[-3.88/0.56]? Metallicity from RAVE-onphys.abund.FefloatnullableTeff[4027/9627]? Stellar effective temperature from this workKphys.temperature.effectiveintnullablelogg[0.12/4.85]? Stellar surface gravity from this worklog(cm.s**-2)phys.gravityfloatnullable[Fe/H][-3.74/0.32]? Metallicity from this workphys.abund.Fefloatnullable[C/Fe][-1.59/2.49]? Carbon-abundance ratio from this workphys.abundfloatnullableD[C/Fe][0/0.77]? Differential carbon-abundance (Placco et al. 2014ApJ...797...21P)phys.abundfloatnullable[a/Fe][-0.2/0.6]? {alpha}-element abundance ratio from this workphys.abundfloatnullableJ/AJ/155/256/table4Gaia/TGAS parameterse_Plx[0.21/0.99] Uncertainty in Plxmasstat.error;pos.parallaxfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAVERAVE positional identifier (JHHMMSS.s+DDMMSS)meta.id;meta.maincharTGASGaia/TGAS identifier (Cat. I/337)meta.idGmag[6.28/12.45] Gaia/TGAS G magnitudemagphot.mag;em.opt.RfloatpmRA[-271.336/286.579] Gaia/TGAS proper motion in right ascension directionmas/yrpos.pm;pos.eq.radoublee_pmRA[0.034/7.464] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-283.56/103.268] Gaia/TGAS proper motion in declination directionmas/yrpos.pm;pos.eq.decdoublee_pmDE[0.024/8.203] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatPlx[-2.63/18.07] Gaia/TGAS parallax {pi}maspos.parallaxfloatDist[0.055/3.11] Derived distance (1)kpcpos.distance;pos.heliocentricfloate_Dist[0.001/3.231] Uncertainty in Dist (1)kpcstat.errorfloatVt[1/533] Transverse velocitykm/sphys.veloc.transverseintZ[-2.987/2.314] Height above Galactic planekpcpos.cartesian.z;pos.galacticfloatJ/AJ/155/256/sampleObserving details (table 1) , coordinates, magnitudes, color indices, and redenning estimates (table 2)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAVERAVE positional identifier (JHHMMSS.s+DDMMSS)meta.id;meta.maincharprimarymoreindicates stellar parameters in Table 3meta.ref.urlcharDateUTC observation datetime.epoch;obsnullableTelTelescopemeta.id;instr.telcharInstInstrumentmeta.id;instrcharIDProposal identifiermeta.id;obscharExp[3/1500] Exposure timestime.duration;obs.exposureintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainGLON[0.06/359.348] Galactic longitudedegpos.galactic.lonGLAT[-85.786/65.804] Galactic latitudedegpos.galactic.latfloatVmag[7.278/15.59]? APASS V band magnitude (Henden & Munari 2014CoSka..43..518H)magphot.mag;em.opt.VfloatnullableB-V[-0.128/4.277]? APASS B-V color (Henden & Munari 2014CoSka..43..518H)magphot.color;em.opt.B;em.opt.VfloatnullableJmag[3.414/12.975] 2MASS J band magnitudemagphot.mag;em.IR.JfloatJ-Ks[-0.102/2.704] 2MASS J-K_s_ colormagphot.color;em.IR.J;em.IR.KfloatE(B-V)[0.003/0.3] Reddening estimate (Schlegel et al. 1998ApJ...500..525S)magphot.color.excessfloatJ/AJ/155/256/table5Group assignments for carbon-enhanced metal-poor (CEMP) starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAVERAVE positional identifier (JHHMMSS.s+DDMMSS)meta.id;meta.maincharVmag[9.04/13.79]? APASS V band magnitude (Henden & Munari 2014CoSka..43..518H)magphot.mag;em.opt.VfloatnullableTeff[4153/7766] Stellar effective temperatureKphys.temperature.effectiveint[Fe/H][-3.68/-1.02] Metallicityphys.abund.Zfloat[C/Fe][-0.01/2.49] Carbon-abundance ratiophys.abundfloat[C/Fe]c[0.7/2.62] Corrected carbon-abundance ratiophys.abundfloatA(C)c[6.06/9.32] Corrected absolute carbon abundancephys.abundfloatGroup[I II III] Carbon-enhanced metal-poor group (1)src.classchar