J/MNRAS/446/2348ivo://CDS.VizieR/J/MNRAS/446/2348doi:10.26093/cds/vizier.74462348CDSKarinkuzhi D.Goswami A.2024-08-14T20:18:51Z2017-11-16T08:31:16ZCDS support team

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

cds-question@unistra.frcarbon-starslate-type-starschemical-abundancesline-intensitiesWe present detailed chemical analyses for a sample of 12 stars selected from the CH star catalogue of Bartkevicius (1996BaltA...5..217B). The sample includes two confirmed binaries, four objects that are known to show radial velocity variations and the rest with no information on the binary status. A primary objective is to examine if all these objects exhibit chemical abundances characteristics of CH stars, based on detailed chemical composition study using high-resolution spectra. We have used high-resolution (R~42000) spectra from the ELODIE archive (Moultaka et al. 2004PASP..116..693M). These spectra cover 3900 to 6800 {AA} in the wavelength range. We have estimated the stellar atmospheric parameters, the effective temperature T_eff_, the surface gravity log g, and metallicity [Fe/H] from local thermodynamic equilibrium analysis using model atmospheres. Estimated temperatures of these objects cover a wide range from 4200 to 6640 K, the surface gravity from 0.6 to 4.3 and metallicity from -0.13 to -1.5. We report updates on elemental abundances for several heavy elements, Sr, Y, Zr, Ba, La, Ce, Pr, Nd, Sm, Eu and Dy. For the object HD 89668, we present the first abundance analyses results. Enhancement of heavy elements relative to Fe, a characteristic property of CH stars is evident from our analyses in the case of four objects, HD 92545, HD 104979, HD 107574 and HD 204613. A parametric-model-based study is performed to understand the relative contributions from the s- and r-process to the abundances of the heavy elements.2015MNRAS.446.2348Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/2348CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/105/419 : Spectral Atlas of Carbon Stars (Barnbaum+ 1996)J/MNRAS/440/1095 : Chemical analysis of CH stars (Karinkuzhi+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/2348https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/2348http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/2348https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/446/2348https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/446/2348http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/446/2348GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/446/2348/table1 (Basic data for the programme stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/2348/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/2348/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/2348/table1?GETtext/xml+votable180.050000true108.047375-22.98350280.0055555555555555566/9216 15481 20804 25008 25051 26089 26655 27217 27752 30344 32561 44653https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/446/2348?format=asciidefaultJ/MNRAS/446/2348/table1Basic data for the programme starsNameStar name (HD NNNNNN)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNum[1/12] Star number, as in other tablesmeta.numberintRAJ2000Simbad Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad Degree of Declination (J2000)pos.eq.dec;meta.mainBmagSimbad B-band magnitudemagphot.mag;em.opt.BfloatVmagSimbad V-band magnitudemagphot.mag;em.opt.VfloatJmagSimbad J-band magnitudemagphot.mag;em.IR.JfloatHmagSimbad H-band magnitudemagphot.mag;em.IR.HfloatKmagSimbad K-band magnitudemagphot.mag;em.IR.KfloatAbundAbundances from table4meta.ref.urlcharEWEquivalent widths from table8 and table9meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/446/2348/table4Fe lines used for deriving atmospheric parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavelength ({AA})0.1nmem.wldoubleElElementphys.atmol.elementcharElowLower energy leveleVphys.energy;phys.atmol.levelfloatloggfOscillator strengthphys.atmol.oscStrengthfloatAbund1? HD 55496 abundance0.1pmphys.abundfloatnullableAbund2? HD 89668 abundance0.1pmphys.abundfloatnullableAbund3? HD 92545 abundance0.1pmphys.abundfloatnullableAbund4? HD 104979 abundance0.1pmphys.abundfloatnullableAbund5? HD 107574 abundance0.1pmphys.abundfloatnullableAbund6? HD 111721 abundance0.1pmphys.abundfloatnullableAbund7? HD 122202 abundance0.1pmphys.abundfloatnullableAbund8? HD 126681 abundance0.1pmphys.abundfloatnullableAbund9? HD 148897 abundance0.1pmphys.abundfloatnullableAbund10? HD 164922 abundance0.1pmphys.abundfloatnullableAbund11? HD 167768 abundance0.1pmphys.abundfloatnullableAbund12? HD 204613 abundance0.1pmphys.abundfloatnullableJ/MNRAS/446/2348/table8Equivalent widths in m{AA} of lines used for the calculation of light element abundancesWaveWavelength ({AA})0.1nmem.wldoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintElElementphys.atmol.elementcharElowLower energy leveleVphys.energy;phys.atmol.levelfloatloggfOscillator strengthphys.atmol.oscStrengthfloatEW1? HD 55496 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW2? HD 89668 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW3? HD 92545 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW4? HD 104979 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW5? HD 107574 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW6? HD 111721 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW7? HD 122202 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW8? HD 126681 Equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW9? HD 148897 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW10? HD 164922 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW11? HD 167768 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW12? HD 204613 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableJ/MNRAS/446/2348/table9Equivalent widths in m{AA} of lines used for abundance determination of heavy elementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavelength ({AA})0.1nmem.wldoubleElElementphys.atmol.elementcharElowLower energy leveleVphys.energy;phys.atmol.levelfloatloggfOscillator strengthphys.atmol.oscStrengthfloatEW1? HD 55496 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW2? HD 89668 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW3? HD 92545 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW4? HD 104979 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW5? HD 107574 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW6? HD 111721 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW7? HD 122202 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW8? HD 126681 Equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW9? HD 148897 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW10? HD 164922 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW11? HD 167768 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullableEW12? HD 204613 equivalent width of line (m{AA})0.1pmspect.line.eqWidthfloatnullable