J/ApJ/865/44ivo://CDS.VizieR/J/ApJ/865/44doi:10.26093/cds/vizier.18650044CDSAfsar M.Sneden C.Wood M.P.Lawler J.E.Bozkurt Z.Bocek Topcu G.,Mace G.N.Kim H.Jaffe D.T.2019-10-01T11:54:33Z2019-09-30T08:57:51ZCDS support team

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

cds-question@unistra.frchemical-abundanceshorizontal-branch-starsinfrared-astronomyspectroscopyvisible-astronomyWe have derived elemental abundances of three field red horizontal branch stars using high-resolution (R~45000), high signal-to-noise ratio (S/N>~200) H- and K-band spectra obtained with the Immersion Grating Infrared Spectrograph (IGRINS). We have determined the abundances of 21 elements, including {alpha} (Mg, Si, Ca, S), odd-Z (Na, Al, P, K), Fe-group (Sc, Ti, Cr, Co, Ni), neutron-capture (Ce, Nd, Yb), CNO-group elements. S, P, and K are determined for the first time in these stars. H- and K-band spectra provide a substantial number of S I lines, which potentially can lead to a more robust exploration of the role of sulfur in the cosmochemical evolution of the Galaxy. We have also derived ^12^C/^13^C ratios from synthetic spectra of the first-overtone ^12^CO (2-0) and (3-1) and ^13^CO (2-0) lines near 23440{AA} and ^13^CO (3-1) lines at about 23730{AA}. Comparison of our results with the ones obtained from the optical region suggests that the IGRINS high-resolution H- and K-band spectra offer more internally self-consistent line abundances of the same species for several elements, especially the {alpha}-elements. This in turn provides more reliable abundances for the elements with analytical difficulties in the optical spectral range.2018ApJ...865...44Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/865/44CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+AS/141/491 : Chemical composition of halo and disk stars (Nissen+, 2000)J/A+A/354/169 : Metal-poor field stars abundances (Gratton+, 2000)J/A+A/360/509 : Chemical abundances in 7 red giants (Hamdani+, 2000)J/A+A/380/578 : EWs of 13 horizontal branch stars (Tautvaisiene+, 2001)J/A+A/435/373 : Broadening of Fe II lines by H collisions (Barklem+, 2005)J/ApJ/645/613 : Abundances of HD 221170 (Ivans+, 2006)J/AJ/134/1216 : Abundances of NGC7142, 6939, & IC4756 stars (Jacobson+, 2007)J/ApJ/667/1267 : CrI transition probabilities (Sobeck+, 2007)J/ApJS/182/51 : Transition prob. of rare earth elements (Lawler+, 2009)J/AJ/140/1694 : Abundances of non-variable red & blue HB stars (For+, 2010)J/A+A/535/A30 : Abundances of 12 stars in open clusters (Carrera+, 2011)J/AJ/141/175 : Abundances in M15 RGB/RHB stars (Sobeck+, 2011)J/ApJ/753/64 : Abundances for 97 metal-poor stars (Ishigaki+, 2012)J/MNRAS/419/1350 : Red giants abundances in 4 open clusters (Reddy+, 2012)J/ApJS/208/27 : Sun and HD 84937 TiII log(gf) and abundances (Wood+, 2013)J/ApJ/797/69 : Abundances of late-type stars (Roederer+, 2014)J/ApJS/214/26 : Line lists for CN isotopes transitions (Sneden+, 2014)J/ApJS/211/20 : NiI transition probability measurements (Wood+, 2014)J/MNRAS/446/3562 : Abundances of red giants in NGC752 (Bocek Topcu+, 2015)J/ApJS/220/13 : Co I transition probabilities (Lawler+, 2015)J/ApJS/221/24 : SDSS-III APOGEE H-band spectral line lists (Shetrone+, 2015)J/ApJ/819/103 : Abundances of two very metal-poor stars (Afsar+, 2016)J/MNRAS/463/580 : Abundances of red giants in NGC6940 (Bocek+, 2016)J/A+A/594/A43 : APOGEE/Kepler sample stars abundances (Hawkins+, 2016)J/A+A/600/A104 : Potassium abundance in 3 GCs (Mucciarelli+, 2017)J/AJ/155/240 : A spectroscopic survey of field RHB stars (Afsar+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/865/44https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/865/44http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/865/44https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/865/44https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/865/44http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/865/44GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/865/44/redhb (Red horizontal branch star data and model atmosphere parameters adopted (Table 1 and 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/865/44/redhb?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/865/44/redhb?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/865/44/redhb?GETtext/xml+votable180.050000true165.9022178-13.43491220.0055555555555555566/5470 20208 25324https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/865/44?format=asciiInfraredOpticaldefaultJ/ApJ/865/44/redhbRed horizontal branch star data and model atmosphere parameters adopted (Table 1 and 2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIP numbermeta.idintHDHD namemeta.idcharVmag[6.3/7.9] SIMBAD V-band magnitudemagphot.mag;em.opt.VfloatHmag[4.4/6.2] SIMBAD H-band magnitudemagphot.mag;em.IR.HfloatKmag[4.3/6.1] SIMBAD K-band magnitudemagphot.mag;em.IR.KfloatplxHIP[4.4/6.3] Parallax from HIP (van Leeuwen, 2007, I/311)maspos.parallax.trigfloatplxGaia[4.7/5.9] Parallax from Gaia DR2 (I/345)maspos.parallax.trigfloatVMag[0.1/1.3] Absolute V-band magnitude based on Gaia DR2magphot.mag;em.opt.VfloatDateUT date of IGRINS observationtime.epoch;obsnullableExp[120/720] Exposure timestime.duration;obs.exposureintu_S/N[~] Uncertainty flag on S/Nmeta.code.errorcharS/N[200/450] Signal to noise ratiostat.snrintTeff[5099/5307] Effective temperature (1)Kphys.temperature.effectiveintlogg[2.3/2.7] Log of surface gravity (1)log(cm.s**-2)phys.gravityfloat[M/H][-0.4/-0.1] Metallicity (1)phys.abund.ZfloatVt[1.3/1.9] Microturbulent velocity {xi}_t_ (1)km/sphys.velocfloatADisplay the abundances for this star (link to Table 3)meta.ref.urlcharA18Display data from Afsar+, 2018, J/AJ/155/240meta.ref.urlcharGaiaDisplay data from Gaia DR2 (I/345) within 1"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_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.mainJ/ApJ/865/44/table3Abundances from individual transitionlogAbd1[0.8/7.9]? HIP 54048 log abundance of Ionphys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonSpecies identifierphys.atmol.ionStagecharlambda[4545.9/23379.2] Wavelength in Angstroms0.1nmem.wldoubleLEP[0/9.7] Lower excitation potentialeVphys.atmol.excitation;stat.minfloatlog(gf)[-4.8/0.8] log oscillator strengthphys.atmol.oscStrengthfloatr_log(gf)[1/30] Source code for log(gf) (1)meta.ref;pos.frameintMethMethod use to obtain abundance (2)meta.notecharlogAbd2[0.6/8.4]? HIP 57748 log abundance of Ionphys.abundfloatnullablelogAbd3[0.5/8]? HIP 114809 log abundance of Ionphys.abundfloatnullable