J/ApJ/791/58ivo://CDS.VizieR/J/ApJ/791/58doi:10.26093/cds/vizier.17910058CDSAdamczak J.Lambert D.L.2017-12-07T07:27:12Z2017-04-07T15:42:34ZCDS support team

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

cds-question@unistra.frchemical-abundancescarbon-starsstellar-atmosphereseffective-temperaturevisible-astronomytrigonometric-parallaxWe derived atmospheric parameters and spectroscopic abundances for C and O for a large sample of stars located in the Hertzsprung gap in the Hertzsprung-Russell diagram in order to detect chemical peculiarities and get a comprehensive overview of the population of stars in this evolutionary state. We have observed and analyzed high-resolution spectra (R = 60,000) of 188 stars in the mass range 2-5 M_{sun}_ with the 2.7 m Harlan J. Smith Telescope at the McDonald Observatory including 28 stars previously identified as Am/Ap stars. We find that the C and O abundances of the majority of stars in the Hertzsprung gap are in accordance with abundances derived for local lower-mass dwarfs but detect expected peculiarities for the Am/Ap stars. The C and O abundances of stars with T_eff_< 6500 K are slightly lower than for the hotter objects but the C/O ratio is constant in the analyzed temperature domain. No indication of an alteration of the C and O abundances of the stars by mixing during the evolution across the Hertzsprung gap could be found before the homogenization of their atmospheres by the first dredge-up.2014ApJ...791...58Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/791/58CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)J/A+A/353/528 : CNO abundances in carbon stars (Ohnaka+, 2000)J/A+A/568/A25 : C and O abundances in stellar populations (Nissen+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/791/58https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/791/58http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/791/58https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/791/58https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/791/58http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/791/58GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/791/58/table1 (Observation log of analyzed spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/791/58/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/791/58/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/791/58/table1?GETtext/xml+votable180.050000true25.911577852.88578080.0055555555555555566/326 859 1661 2399 2898 3138 3257 3302 3333 4143 4181 4279 4465 4493 4548 4608 4652 4695 4709 4716 4798 4822 5041 5154 5185 5323 5470 5509 6146 6166 6184 6328 6426 6477 6498 6574 6855 7195 7241 7400 7450 7525 7626 7701 8044 8218 8269 8336 8468 8534 8803 8911 8928 9054 9233 9339 9498 9751 9986 10106 10197 10215 10545 10557 10835 10904 10965 11029 11033 11119 11427 11554 11835 11848 11860 11918 11942 11983 12004 12944 13006 13099 13128 13166 13277 13655 13756 13878 14075 14385 14440 14672 14683 14721 14743 15042 15106 15200 15244 15491 15909 16043 21700 21792 21967 22104 22106 22251 22293 22329 22333 22459 22465 22493 22497 23350 23492 23635 23820 23829 23854 23969 24150 24315 24380 24547 24979 25082 25211 25594 25680 26377 26886 26929 26967 27232 27269 27295 27422 27562 27729 28151 28252 28422 28480 28486 28619 28645 29909 30221 30294 30317 30335 30431 30456 30501 30992 31174 31217 31382 31642 31749 31904 31967 31976 31977 32009 32130 32229 32287 32460 32519 32661 32674 32675 32702 40721 40734 40876 40892 44380 44388 44524 44720 44735 44791 448393.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/791/58?format=asciiOpticaldefaultJ/ApJ/791/58/table4H-alpha and photometric parameters for the program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharTeffHa? Effective temperature from H-alphaKphys.temperature.effectiveintnullablee_TeffHa? The error in TeffHaKstat.errorintnullableTeffEffective temperature from photometryKphys.temperature.effectiveinte_TeffThe error in TeffKstat.error;phys.temperature.effectiveintlog(g)Log surface gravitylog(cm.s**-2)phys.gravityfloate_log(g)The error in log(g)log(cm.s**-2)stat.errorfloatJ/ApJ/791/58/table5Adopted atmospheric parameters for the program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_TeffThe error in TeffKstat.error;phys.temperature.effectiveinto_TeffNumber of different temperature indicators for Teffmeta.numberintlog(g)? Log surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_log(g)? The error in log(g)log(cm.s**-2)stat.errorfloatnullable[Fe/H]? Metallicityphys.abund.Zfloatnullablee_[Fe/H]? The error in [Fe/H]stat.error;phys.abund.FefloatnullableVTurbTurbulent velocitykm/sphys.veloc.microTurbfloate_VTurbThe error in VTurbkm/sstat.errorfloatVsini? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_Vsini? The error in Vsinikm/sstat.error;phys.veloc.rotatfloatnullableJ/ApJ/791/58/table6Masses, distances, and luminosities of the program starsDistDistancepcpos.distance;pos.heliocentricintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharplxParallaxmaspos.parallax.trigfloate_plxThe error in plxmasstat.error;pos.parallaxfloate_DistThe error in Distpcstat.errorintlogLLog luminositylog(solLum)phys.luminosityfloate_logLThe error in logLlog(solLum)stat.errorfloatMassMasssolMassphys.massfloate_MassThe error in MasssolMassstat.error;phys.massfloatJ/ApJ/791/58/table7C abundances for the program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharCLog epsilon carbon abundancephys.abund.Fefloate_CThe error in Cstat.errorfloat[C/H]Log C/H abundance ratiophys.abund.Fefloate_[C/H]The error in [C/H]stat.error;phys.abundfloatMethodMethod used for abundance determination (1)meta.notecharJ/ApJ/791/58/table1Observation log of analyzed spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmoreindicates more data in other tablesmeta.ref.urlcharHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharprimaryHDHD identifier (HD NNNNNN)meta.idcharVmagThe V band magnitudemagphot.mag;em.opt.VfloatObsYear of the observationtime.epochExpExposure timestime.duration;obs.exposurecharSNRSignal-to-Noise Ratiostat.snrinthipDisplay the HIP data (van Leeuwen et al. 2007, Cat. I/311)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/791/58/table2Spectroscopic parameters for the program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_TeffThe error in TeffKstat.error;phys.temperature.effectiveintlog(g)Log surface gravitylog(cm.s**-2)phys.gravityfloate_log(g)The error in log(g)log(cm.s**-2)stat.errorfloat[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]The error in [Fe/H]stat.error;phys.abund.FefloatVTurbMicroturbulent velocitykm/sphys.velocfloate_VTurbThe error in VTurbkm/sstat.errorfloatJ/ApJ/791/58/table3Parameters for the program stars derived with ULySSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_TeffThe error in TeffKstat.error;phys.temperature.effectiveintlog(g)Log surface gravitylog(cm.s**-2)phys.gravityfloate_log(g)The error in log(g)log(cm.s**-2)stat.errorfloat[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]The error in [Fe/H]stat.error;phys.abund.FefloatsigmaDispersion velocitykm/sphys.veloc.dispersionfloate_sigmaThe error in sigmakm/sstat.errorfloatJ/ApJ/791/58/table9O abundances for the program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS identifier (HIP NNNNNN) (van Leeuwen, 2007A&A...474..653V, cat I/311)meta.id;meta.maincharOLog epsilon oxygen abundancephys.abund.Fefloate_OThe error in Ostat.errorfloat[O/H]Log O/H abundance ratiophys.abund.Fefloate_[O/H]The error in [O/H]stat.error;phys.abundfloatMethodMethod used for abundance determination (1)meta.notechar