J/ApJ/794/58ivo://CDS.VizieR/J/ApJ/794/58doi:10.26093/cds/vizier.17940058CDSBeers T.C.Norris J.E.Placco V.M.Lee Y.S.Rossi S.Carollo D.,Masseron T.2017-07-03T13:35:10Z2017-05-12T16:06:40ZCDS support team

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

cds-question@unistra.frmilky-way-galaxypopulation-ii-starschemical-abundancesphotometryinterstellar-reddeningradial-velocityspectroscopystellar-distanceproper-motionsA new set of very high signal-to-noise (S/N>100/1), medium-resolution (R~3000) optical spectra have been obtained for 302 of the candidate "weak-metal" stars selected by Bidelman & MacConnell (1973AJ.....78..687B, Cat. III/46). We use these data to calibrate the recently developed generalization of the Sloan Extension for Galactic Exploration and Understanding and Exploration (SEGUE) Stellar Parameter Pipeline, and obtain estimates of the atmospheric parameters (T_eff_, log g, and [Fe/H]) for these non-Sloan Digital Sky Survey/SEGUE data; we also obtain estimates of [C/Fe]. The new abundance measurements are shown to be consistent with available high-resolution spectroscopic determinations, and represent a substantial improvement over the accuracies obtained from the previous photometric estimates reported in Paper I of this series (Norris et al. 1985ApJS...58..463N). The apparent offset in the photometric abundances of the giants in this sample noted by several authors is confirmed by our new spectroscopy; no such effect is found for the dwarfs. The presence of a metal-weak thick-disk (MWTD) population is clearly supported by these new abundance data. Some 25% of the stars with metallicities -1.8<[Fe/H]<=-0.8 exhibit orbital eccentricities e<0.4, yet are clearly separated from members of the inner-halo population with similar metallicities by their location in a Lindblad energy versus angular momentum diagram. A comparison is made with recent results for a similar-size sample of Radial Velocity Experiment stars from Ruchti et al. (2010ApJ...721L..92R ; 2011ApJ...737....9R). We conclude, based on both of these samples, that the MWTD is real, and must be accounted for in discussions of the formation and evolution of the disk system of the Milky Way.2014ApJ...794...58Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/58CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/90/2089 : Stars of very low metal abundance. I (Beers+, 1985)J/AJ/103/1987 : Stars of very low metal abundance (Beers+ 1992)J/ApJS/123/639 : UBV photometry of metal-weak candidates (Norris+, 1999)J/A+A/354/169 : Metal-poor field stars abundances (Gratton+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/58https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/58http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/58https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/794/58https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/794/58http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/794/58GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/794/58/table1 (Photometric Information and Adopted Reddening)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/794/58/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/58/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/58/table1?GETtext/xml+votable180.050000true2.8636-8.38110.0055555555555555566/16821 16871 17054 17057 17099 17245 17261 17443 17509 17538 17549 17564 17578 18561 20551 20642 20661 20733 20901 21129 21209 21268 21269 21375 21389 21531 21535 21715 21716 22128 22205 22262 22314 22557 22558 22630 23096 23168 23192 23428 23561 23565 24581 24591 24678 24683 24733 24752 24774 24829 24834 24853 24928 24942 25051 25200 25607 25963 28680 28710 28820 28952 28957 28966 29011 29048 29428 29548 29593 29703 29769 29958 30281 30849 31054 31114 32824 32889 33076 33117 33134 33143 33150 33303 33566 33618 33631 33683 33697 33701 33725 33743 33794 33831 33849 33902 33929 34088 34096 34101 34116 34171 34251 34559 34593 34653 34684 34912 35221 35649 35875 35907 36135 36220 36221 36414 36474 36489 36587 36745 36773 37032 37075 37164 37165 37182 37185 37232 37282 37386 37727 37748 37758 37759 37831 37966 37985 38029 38064 38076 38216 38225 38255 38259 38335 38371 38420 38424 38433 38440 38469 38506 38583 38755 38868 39221 39475 39647 39667 39692 39734 40029 40125 40133 40214 40222 40333 40337 40351 40526 40567 40601 40624 40750 41080 41280 41285 41330 41424 41455 41493 41531 41552 41596 41639 41724 41725 41764 41770 41840 41886 41912 41921 41929 42331 42496 42498 42600 42735 42743 42753 42826 43062 43068 43113 43140 43335 43360 43445 43498 43534 43546 43549 43575 43592 43613 43660 43786 43788 43848 43931 43960 44078 44086 44106 44208 44214 44223 44281 44289 44347 44542 44618 44774 44793 44851 44907 44940 45430 45527 45620 45682 45786 45837 45928 45967 46023 46053 46098 46163 46189 46268 46302 46370 46376 46471 46506 46510 46512 46574 46605 46618 46626 46645 46661 46749 46754 46804 46833 46909 46933 47017 47086 47092 47094 47118 47147 47270 47306 47347 47432 47451 47512 47596 47704 47876 47967 48143 48281 48406 48414 48440 48663 48692 48695 48728 48731 48744 48771 48798 48824 489111.5062136169708525e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/794/58?format=asciiOpticaldefaultJ/ApJ/794/58/table1Photometric Information and Adopted ReddeningSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBM[001/326] BM identifier (BM-NNN)meta.id;meta.mainintNameCommon star namemeta.idcharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latVmag? Adopted V band magnitudemagphot.mag;em.opt.VfloatnullableB-V? Adopted (B-V) colormagphot.color;em.opt.B;em.opt.VfloatnullableJmag? 2MASS J band magnitudemagphot.mag;em.IR.JfloatnullableJ-K? 2MASS (J-K) colormagphot.color;em.IR.J;em.IR.KfloatnullableE(B-V)SSchlegel et al. 1998 reddening estimate (1998ApJ...500..525S)magphot.color.excessfloatE(B-V)AAdopted reddening estimatemagphot.color.excessfloatE(B-V)FFinal estimated reddeningmagphot.color.excessfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/794/58/table2Radial Velocities, Line Indices, Atmospheric Parameters, and Type AssignmentsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBM[001/326] BM identifier (BM-NNN)meta.id;meta.mainintN[1/5] Number of measurementsmeta.numberintRVMRadial velocity from medium-resolution spectrakm/sphys.veloc;pos.heliocentricintRVH? Radial velocity from high-resolution spectrakm/sspect.dopplerVelocintnullableKPKP index; Ca II K line strength (1)0.1nmspect.line.intensityfloatHP2? HP2 index; H{delta} line strength (1)0.1nmspect.line.intensityfloatnullableGPGP index; CH G-band strength (1)0.1nmspect.line.intensityfloatHG2? HG2 index; H{gamma} line strength (1)0.1nmspect.line.intensityfloatnullableLACFLog AutoCorrelation Function indexstat.fit.paramfloatTeffS? n-SSPP derived effective temperatureKphys.temperature.effectiveintnullablelog(g)S? n-SSPP derived log surface gravitylog(cm.s**-2)phys.gravityfloatnullable[Fe/H]S? n-SSPP derived metallicityphys.abund.FefloatnullableTeffH? High-resolution derived effective temperatureKphys.temperature.effectiveintnullablelog(g)H? High-resolution derived log surface gravitylog(cm.s**-2)phys.gravityfloatnullable[Fe/H]H? High-resolution derived metallicityphys.abund.FefloatnullableTeffC? Corrected n-SSPP derived effective temperatureKphys.temperature.effectiveintnullablelog(g)C? Corrected n-SSPP derived log surface gravitylog(cm.s**-2)phys.gravityfloatnullable[Fe/H]C? Corrected n-SSPP derived metallicityphys.abund.Fefloatnullable[Fe/H]N? DDO photometry-based metallicityphys.abund.FefloatnullableTypeLuminosity type (2)meta.codecharJ/ApJ/794/58/table3Carbon Abundance Ratio Estimatesf_[C/Fe]C[a] Flag on [C/Fe]C (3)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBM[001/326] BM identifier (BM-NNN)meta.id;meta.mainint[C/Fe]S? Medium-resolution carbonicity estimatephys.abundfloatnullableDETECT[DLUN: ] Detection code (1)meta.codecharCC? Correlation coefficient (2)stat.correlationfloatnullable[C/Fe]H? High-resolution carbonicity estimatephys.abundfloatnullable[C/Fe]C? Corrected n-SSPP carbonicity estimatephys.abundfloatnullableJ/ApJ/794/58/table4Parallaxes, Distance Estimates, and Proper MotionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBM[001/326] BM identifier (BM-NNN)meta.id;meta.mainintplxHIP? HIPPARCOS parallaxmaspos.posAngfloatnullablee_plxHIP? Error in plxHIPmasstat.errorfloatnullableDpho? Photometric distancekpcpos.distancefloatnullableDHIP? Trigonometric distancekpcpos.distancefloatnullableRatio? Ratio of HIPPARCOS error to its parallaxstat.errorfloatnullableDado? Adopted distancekpcpos.distancefloatnullablee_Dado? Error in Dadokpcstat.errorfloatnullablepmRAProper motion along Right Ascensionmas/yrpos.pm;pos.eq.radoublepmDEProper motion along Declinationmas/yrpos.pm;pos.eq.decdoublee_pmRAError in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloate_pmDEError in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatIDHIPPARCOS or TYCHO identifiermeta.idcharJ/ApJ/794/58/table5Space Motions and Orbital Parametersecc? Orbital eccentricitysrc.orbital.eccentricityfloatnullableINOUTMembership code (2)meta.code.membercharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBM[001/326] BM identifier (BM-NNN)meta.id;meta.mainintRDistance from Galactic centerkpcpos.distance;pos.galactocentricfloatZDistance above Galactic planekpcpos.distance;pos.galacticfloatU? The U velocitykm/sphys.veloc;pos.cartesian.xintnullableVThe V velocitykm/sphys.veloc;pos.cartesian.yintWThe W velocitykm/sphys.veloc;pos.cartesian.zinte_UError in Ukm/sstat.error;pos.cartesian.xinte_VError in Vkm/sstat.error;pos.cartesian.yinte_WError in Wkm/sstat.error;pos.cartesian.zintVRVelocity projected onto Galactic plane (1)km/sphys.veloc;pos.galacticintVphiDerived rotation velocitykm/sphys.veloc.rotatintrperi? Perigalactic radiuskpcphys.size.radiusfloatnullablerapo? Apogalactic radiuskpcphys.size.radiusfloatnullableZmax? Maximum Galactic scale heightkpcpos.cartesian.z;pos.galacticfloatnullable