J/AJ/130/2804ivo://CDS.VizieR/J/AJ/130/2804doi:10.26093/cds/vizier.51302804CDSRossi S.Beers T.C.Sneden C.Sevastyanenko T.Rhee J.Marsteller B.2017-12-12T14:45:18Z2006-12-17T21:58:58ZCDS support team

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

cds-question@unistra.frchemical-abundancescarbon-starschemically-peculiar-starsWe develop and test a method for the estimation of metallicities ([Fe/H]) and carbon abundance ratios ([C/Fe]) for carbon-enhanced metal-poor (CEMP) stars based on the application of artificial neural networks, regressions, and synthesis models to medium-resolution (1-2{AA}) spectra and J-K colors. We calibrate this method by comparison with metallicities and carbon abundance determinations for 118 stars with available high-resolution analyses reported in the recent literature.2005AJ....130.2804Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/130/2804CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/103/1987 : Stars of very low metal abundance (Beers+ 1992)J/A+A/354/169 : Metal-poor field stars abundances (Gratton+, 2000)J/A+A/356/238 : Atmospheric parameters in metal-poor stars. III.J/A+A/375/366 : Carbon stars from the Hamburg/ESO survey (Christlieb+ 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/130/2804https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/130/2804http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/130/2804https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/130/2804https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/130/2804http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/130/2804GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/130/2804/calib (Data for calibration stars (tables 1, 3 and 4of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/2804/calib?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/2804/calib?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/2804/calib?GETtext/xml+votable180.050000true63.30463196.60048860.005555555555555556Cone search capability for table J/AJ/130/2804/program (Data for program stars (tables 6 and 7 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/2804/program?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/2804/program?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/2804/program?GETtext/xml+votable180.050000true53.1368333-11.47713890.0055555555555555566/2997 3712 4423 5723 6051 6058 6792 7767 8197 8228 8266 8314 8328 8864 9065 10340 10359 10430 10476 11197 12793 13354 16115 16603 16659 16680 16776 16808 16821 16880 16892 17099 17184 17221 17234 17392 17420 17462 17578 17642 18483 18507 18553 18683 18707 18719 18737 18945 18990 19070 19210 19211 21269 22205 22662 23428 25051 25569 25595 25607 25733 26044 26109 26347 26366 27767 27796 27871 28540 29548 29769 30831 30929 31136 31427 31592 31658 32352 32889 33260 33262 33470 33483 33526 33642 33708 35009 35551 35599 35768 35784 36221 36228 36688 36737 38806 38868 40222 40337 41831 42496 43321 43360 44208 44541 44542 44575 44771 45404 45463 45491 45694 45735 45790 45796 45797 45806 45808 45818 45825 45830 45861 46023 46083 46090 46447 46458 46541 46577 46663 46704 46791 46792 46796 46851 47009 47193 47332 47344 47436 47478 47541 47556 47698 47876 48131 48135 48173 48221 48234 48362 48391 48392 48501 48519 48555 48557 48636 48722 48798 48824 490781.398457827073138e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/130/2804?format=asciiOpticaldefaultJ/AJ/130/2804/calibData for calibration stars (tables 1, 3 and 4of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharVmagThe V band magnitudemagphot.mag;em.opt.VfloatB-VThe (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatJmag2MASS J band magnitudemagphot.mag;em.IR.Jfloate_JmagUncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatJ-K2MASS (J-K) color indexmagphot.color;em.IR.J;em.IR.Kfloate_J-KUncertainty in J-Kmagstat.error;phot.color;em.IR.JfloatE(B-V)The adopted E(B-V) color excessmagphot.color.excessfloat(B-V)0The intrinsic (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloat(J-K)0The intrinsic (J-K) color indexmagphot.color;em.IR.J;em.IR.KfloatSimbadNameSimbad column added by the CDSmeta.idcharTelTelescope(s) used in the observation (G1)instr.setup;obscharKPThe KP line index (G2)0.1nmspect.indexfloatGPThe GP line index (G3)0.1nmspect.indexfloat[Fe/H]Adopted [Fe/H] from literaturelog(Sun)phys.abund.Fefloat[C/H]Adopted [C/H] from literaturelog(Sun)phys.abundfloat[C/Fe]Adopted [C/Fe] from literaturelog(Sun)phys.abundfloatRefReference source(s) (detailed in refs.dat)meta.ref;pos.framecharTeffModel effective temperature (1)Kphys.temperature.effective;meta.modelledintlog(g)Model log surface gravity (1)log(cm.s**-2)phys.gravity;meta.modelledfloatM[Fe/H]Model [Fe/H] (1)log(Sun)phys.abund.Fe;meta.modelledfloatxiMicroturbulence velocity (1)km/sphys.veloc.microTurbfloat[Fe/H]ADerived artificial neural network analysis [Fe/H]log(Sun)phys.abund.Fefloatres[Fe/H]AResidual in derived [Fe/H]Alog(Sun)stat.fit.residual;phys.abund.Fefloat[Fe/H]R? Derived regression analysis [Fe/H]log(Sun)phys.abund.Fefloatnullableres[Fe/H]R? Residual in derived [Fe/H]Rlog(Sun)stat.fit.residual;phys.abund.Fefloatnullable[C/Fe]ADerived analysis [C/Fe]log(Sun)phys.abundfloatres[C/Fe]Residual in derived [C/Fe]Alog(Sun)stat.fit.residualfloat[C/Fe]RDerived regression analysis [C/Fe]log(Sun)phys.abundfloatres[C/Fe]RResidual in derived [C/Fe]Rlog(Sun)stat.fit.residualfloatB-Teff[1/4] Calibration star groupings in effective temperature bin (1)meta.idintB-Fe/H[1/4] Calibration star groupings in [Fe/H] bin (2)meta.idintB-C/Fe[1/4] Calibration star groupings in [C/Fe] bin (3)meta.idintl_[C/Fe]SLimit flag on [C/Fe]Smeta.code.error;phys.abundchar[C/Fe]SSpectral synthesis estimate of [C/Fe]log(Sun)spect.indexfloatu_[C/Fe]S[ :] Uncertainty flag on [C/Fe]S (4)meta.code.error;phys.abundcharres[C/Fe]S? Residual in [C/Fe]Slog(Sun)stat.fit.residualfloatnullablef_Name[X] Indicates star not used in calibration of the ANNs or regression estimates of [C/Fe]meta.codechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullableJ/AJ/130/2804/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibcodeBibcodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharCommCommentmeta.notecharJ/AJ/130/2804/programData for program stars (tables 6 and 7 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBPS-CSStar name (BPS CS NNNNN-NNN in Simbad)meta.id;meta.maincharVmag? The V band magnitudemagphot.mag;em.opt.VfloatnullableB-V? The (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatnullableJmag? The J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableJ-K? The (J-K) color indexmagphot.color;em.IR.J;em.IR.Kfloatnullablee_J-K? Uncertainty in J-Kmagstat.error;phot.color;em.IR.JfloatnullableE(B-V)The (B-V) color excessmagphot.color.excessfloat(B-V)0? The intrinsic (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloatnullable(J-K)0? The intrinsic (J-K) color indexmagphot.color;em.IR.J;em.IR.KfloatnullableSimbadSimbad column added by the CDScharTelTelescope used in the observation (G1)instr.setup;obscharKPThe KP line index (G2)spect.indexfloatGPThe GP line index (G3)spect.indexfloat[Fe/H]A? Log of the artificial neural network analysis Fe/H abundance estimatelog(Sun)phys.abund.Fefloatnullable[Fe/H]R? Log of the regression analysis Fe/H abundancelog(Sun)phys.abund.Fefloatnullable[C/Fe]ALog of the artificial neural network analysis C/Fe abundance estimatelog(Sun)phys.abundfloatu_[C/Fe]A[ :] Uncertainty flag on [C/Fe]A (2)meta.code.error;phys.abundchar[C/Fe]RLog of the regression analysis C/Fe abundancelog(Sun)phys.abundfloatu_[C/Fe]R[ :] Uncertainty flag on [C/Fe]R (2)meta.code.error;phys.abundcharTeff? Model effective temperatureKphys.temperature.effective;meta.modelledintnullablelog(g)? Model log surface gravitylog(cm.s**-2)phys.gravity;meta.modelledfloatnullableM[Fe/H]? Model log of the Fe/H number abundancelog(Sun)meta.idfloatnullablexi? Microturbulence velocitykm/sphys.veloc.microTurbfloatnullable[C/Fe]S? Log of the spectral synthesis estimate of C/Fe abundancelog(Sun)phys.abundfloatnullableu_[C/Fe]S[ :] Uncertainty flag on [C/Fe]S (2)meta.code.error;phys.abundchar[C/Fe]FLog of the final adopted [C/Fe] abundancelog(Sun)phys.abundfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main