J/ApJ/788/180ivo://CDS.VizieR/J/ApJ/788/180doi:10.26093/cds/vizier.17880180CDSCarollo D.Freeman K.Beers T.C.Placco V.M.Tumlinson J.Martell S.L.2017-11-14T13:37:11Z2017-08-04T13:50:57ZCDS support team

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

cds-question@unistra.frmilky-way-galaxychemically-peculiar-starseffective-temperaturemetallicityradial-velocityproper-motionsWe explore the kinematics and orbital properties of a sample of 323 very metal-poor stars in the halo system of the Milky Way, selected from the high-resolution spectroscopic follow-up studies of Aoki et al. (2013, J/AJ/145/13) and Yong et al (2013, J/ApJ/762/26). The combined sample contains a significant fraction of carbon-enhanced metal-poor (CEMP) stars (22% or 29%, depending on whether a strict or relaxed criterion is applied for this definition). Barium abundances (or upper limits) are available for the great majority of the CEMP stars, allowing for their separation into the CEMP-s and CEMP-no subclasses. A new method to assign membership to the inner- and outer-halo populations of the Milky Way is developed, making use of the integrals of motion, and applied to determine the relative fractions of CEMP stars in these two subclasses for each halo component. Although limited by small-number statistics, the data suggest that the inner halo of the Milky Way exhibits a somewhat higher relative number of CEMP-s stars than CEMP-no stars (57% versus 43%), while the outer halo possesses a clearly higher fraction of CEMP-no stars than CEMP-s stars (70% versus 30%). Although larger samples of CEMP stars with known Ba abundances are required, this result suggests that the dominant progenitors of CEMP stars in the two halo components were different; massive stars for the outer halo, and intermediate-mass stars in the case of the inner halo.2014ApJ...788..180Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/788/180CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/290/885 : Abundances of very metal-poor stars (Primas+, 1994)J/AJ/119/2866 : Proper motions of metal-poor stars (Beers+, 2000)J/AJ/145/13 : Metal-poor stars from SDSS/SEGUE. I. Abundances (Aoki+, 2013)J/ApJ/762/26 : Most metal-poor stars. II. 190 Galactic halo starsJ/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)J/AJ/147/136 : Stars of very low metal abundance. VI. Abundanceshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/788/180https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/788/180http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/788/180https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/788/180https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/788/180http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/788/180GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/788/180/Parameters (Parameters for the Aoki+ (2013, J/AJ/145/13) (table1) and Yong+ (2013, J/ApJ/762/26) (table2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/788/180/Parameters?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/788/180/Parameters?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/788/180/Parameters?GETtext/xml+votable180.050000true0.58329.4810.0055555555555555566/0 25 51 712 971 1701 2067 2180 4101 4111 4253 4269 4706 4750 4854 5093 5310 5373 5406 5450 5723 5768 5775 5973 6051 6219 6375 6401 6412 6652 7321 7787 7830 8127 8197 8205 8228 8244 8266 8328 8335 8367 8370 8418 8665 8667 8766 8864 8930 9072 9087 9153 9291 9298 9380 9438 9462 9467 9512 9581 9583 9594 9901 9914 10147 10149 10173 10282 10340 10376 10425 10430 10476 10786 10921 10934 11277 11328 11330 11405 11432 11439 11442 11452 11490 11543 11848 12656 12793 15001 15349 16540 16549 16565 16587 16603 16654 16680 16716 16736 16773 16795 16796 16821 16865 16880 16935 16984 17221 17233 17237 17240 17253 17343 17357 17362 17392 17406 17420 17543 17545 17555 17578 17598 17600 17623 17642 17788 17850 18023 18063 18074 18226 18410 18519 18564 18579 18608 18612 18636 18637 18663 18683 18708 18719 18926 18953 18973 19017 19070 19116 19210 19211 19329 19566 19599 19602 19752 19903 19968 20034 20171 20330 20474 21195 21198 21854 21971 22356 22514 22650 22662 23011 23207 23240 23342 23429 23467 24046 24674 24918 25357 25385 25540 25574 25678 25719 25813 25887 25891 25963 25980 25993 26027 26114 26115 26162 26198 26232 26265 26450 26457 26565 26658 26941 27035 27048 27105 27322 27360 27589 27884 27986 28054 28097 28119 28219 28540 28587 28594 29777 30041 30045 30891 30963 31377 31394 31395 31427 31528 31585 31595 31719 31882 32156 32302 32352 32444 32468 32553 33470 33515 33579 33642 34069 34357 34574 34751 34844 35009 35181 35524 35532 35561 35710 35731 35736 35768 35784 35803 35825 36084 36196 36280 36356 36503 36542 36583 36658 36705 36737 36789 36837 40319 40410 43926 44016 44542 44575 44990 45345 45470 45546 45694 45797 45808 45818 45825 45904 45913 45959 45969 46008 46565 46614 46699 46792 46796 46958 47063 47556 48221 48234 48286 48501 48517 48526 48534 48614 48625 48722 48734 48798 48824 48862 49009 49012 49019 49078 49149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/788/180?format=asciiOpticaldefaultJ/ApJ/788/180/ParametersParameters for the Aoki+ (2013, J/AJ/145/13) (table1) and Yong+ (2013, J/ApJ/762/26) (table2)SimbadNameSimbad column added by the CDSmeta.idcharDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefSample referencemeta.bib.authorcharNameSource identifier (Plate-MJD-Fiber in table1.dat)meta.id;meta.maincharf_NameFlag on Name (1)meta.codecharTeffEffective temperatureKphys.temperature.effectiveintlog(g)Log surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicityphys.abund.ZfloatRVAdopted radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVUncertainty in RVkm/sstat.errorfloatRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainpmRA? Proper motion in Right Ascension (pmRA*cosDE)mas/yrpos.pm;pos.eq.radoublenullablepmDE? Proper motion in Declinationmas/yrpos.pm;pos.eq.decfloatnullablee_pmRA? Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablee_pmDE? Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableDist? Distancekpcpos.distance;pos.heliocentricfloatnullablel_[C/Fe][<] Limit flag on [C/Fe]meta.code.error;phys.abundchar[C/Fe]? The [C/Fe] abundance ratiophys.abund;arith.ratiofloatnullablel_[Ba/Fe][<] Limit flag on [Ba/Fe]meta.code.error;phys.abundchar[Ba/Fe]? The [Ba/Fe] abundance ratiophys.abund;arith.ratiofloatnullableC[0/3]? Carbon code (2)meta.codeintnullableBa[0/4]? Barium code (3)meta.codeintnullableClass[s no] Adopted CEMP classificationmeta.codecharSampleSample (4)src.samplecharMember[IOTU] Member flag (5)meta.code.memberchar