J/MNRAS/474/2129ivo://CDS.VizieR/J/MNRAS/474/2129doi:10.26093/cds/vizier.74742129CDSKong X.M.Bharat Kumar Y.Zhao G.Zhao J.K.Fang X.S.Shi J.R.,Wang L.Zhang J.B.Yan H.L.2024-08-18T20:17:12Z2021-03-04T09:53:51ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetschemical-abundancesWe report three new barium (Ba) dwarfs lying in Sirius-like systems. They provide direct evidence that Ba dwarfs are companions to white dwarfs (WDs). Atmospheric parameters, stellar masses and the chemical abundances of 25 elements, including light, {alpha}, Fe-peak and s-process elements, are derived from high-resolution and high S/N spectra. The enhancement of s-process elements with [s/Fe] ratios between 0.4 and 0.6 confirm them as mild barium stars. The estimated metallicities (-0.31, -0.06 and 0.13) of BD+68 1027, RE J0702+129 and BD+80 670 are in the range of known Ba dwarfs and giants. As expected, the observed indices [hs/ls], [s/Fe] and [C/Fe] show an anti-correlation with metallicity. Asymptotic giant branch (AGB) progenitor masses are estimated for the WD companions of RE J0702+129 (1.47M_{sun}_) and BD+80 670 (3.59M_{sun}_). These confirm the predicted range of progenitor AGB masses (1.5-4M_{sun}_) for unseen WDs around Ba dwarfs. The surface abundances of s-process elements in RE J0702+129 and BD+80 670 are compared with AGB models and they are in close agreement, within the predicted accretion efficiencies and pollution factors for Ba stars. These results support that the origin of s-process overabundances in Ba dwarfs is similar to those of Ba giants via the McClure hypothesis in which Ba stars accumulate s-process elements through mass transfer from their host companions during the AGB phase.2018MNRAS.474.2129Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/474/2129CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/474/2129https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/474/2129http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/474/2129https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/474/2129https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/474/2129http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/474/2129GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/474/2129/table12 (Log of observations and basic data of stars (table 1) and stellar parameters (table 2) of the programme stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/2129/table12?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/2129/table12?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/2129/table12?GETtext/xml+votable180.050000true282.200308368.87659610.005555555555555556Cone search capability for table J/MNRAS/474/2129/table6 (Atmospheric parameters, stellar mass, and carbon and s-process abundances of Ba dwarfs and CH subgiants)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/2129/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/2129/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/2129/table6?GETtext/xml+votable180.050000true282.200308368.87659610.0055555555555555566/3506 4062 4423 4491 5531 9274 14191 14521 15481 16053 16329 16399 16892 17091 17289 17409 17763 19547 20057 20110 22459 23050 24003 24130 25008 25198 25363 25869 25904 26089 26655 27217 27958 30779 31439 32086 32561 33494 35034 35442 36537 38792 38806 39851 39926 40139 41813 42760 42964 43321 44196 44653 44851 45033 45301 45837 46156 47396 48998https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/474/2129?format=asciidefaultJ/MNRAS/474/2129/table12Log of observations and basic data of stars (table 1) and stellar parameters (table 2) of the programme starsTypeWD typesrc.classcharVmagV magnitudemagphot.mag;em.opt.VfloatVmicMicroturbulent velocitykm/sphys.velocfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharDateObservation datetime.epoch;obsnullableExpTimeExposure timestime.duration;obs.exposureintSpTypeSpectral typesrc.spTypecharPlxH? Hipparcos parallaxmaspos.parallaxfloatnullablee_PlxH? rms uncertainty on Hipparcos parallaxmasstat.errorfloatnullabledHDistance from Hipparcoskpcpos.distancefloatr_dHDistance from Hipparcos reference (1)meta.ref;pos.framecharPlxG? Gaia DR1 parallaxmaspos.parallax.trigfloatnullablee_PlxG? rms uncertainty on Gaia DR1 parallaxmasstat.errorfloatnullabledG? Distance from Gaia DR1kpcpos.distancefloatnullableMWD? WD masssolMassphys.massfloatnullablen_MWDWD mass reference (1)meta.notecharV-KV-K colour indexmagphot.color;em.opt.V;em.IR.KfloatE(V-K)V-K colour excessmagphot.color.excessfloatVMAGAbsolute V magnitudemagphys.magAbsfloatMassPlanet masssolMassphys.massfloatTeffPEffective temperature from V-KKphys.temperature.effectiveintTeffSEffective temperature from spectroscopyKphys.temperature.effectiveintloggPSurface gravity from parallaxlog(cm.s**-2)phys.gravityfloatloggSSurface gravity from spectroscopylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicityphys.abund.ZfloatSimbadSimbad 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/MNRAS/474/2129/table3All atomic-line data used and their corresponding EWs and abundances of program stars and the SunrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar name (1)meta.id;meta.maincharIonIon designationphys.atmol.ionStagecharlambdaWavelength0.1nmem.wldoubleEPExcitation potentialeVphys.atmol.excitationfloatloggflog of Oscillator Strengthphys.atmol.oscStrengthfloatEWLine equivalent width0.1nmspect.line.eqWidthfloatA(X)Absolute element abundancesphys.abundfloatJ/MNRAS/474/2129/table6Atmospheric parameters, stellar mass, and carbon and s-process abundances of Ba dwarfs and CH subgiantsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharMp? Planet mass or lower value of planet mass intervalsolMassphys.massfloatnullableMp2? Upper value of planet mass intervalsolMassphys.massfloatnullableTeffEffective temperatureKphys.temperature.effectiveint[Fe/H]Metallictyphys.abund.FefloatloggSurface gravityphys.gravityfloat[C/Fe]? [C/Fe] abundancephys.abundfloatnullable[Sr/Fe]? [Sr/Fe] abundancephys.abundfloatnullable[Y/Fe]? [Y/Fe] abundancephys.abundfloatnullable[Zr/Fe]? [Zr/Fe] abundancephys.abundfloatnullable[Ba/Fe]? [Ba/Fe] abundancephys.abundfloatnullable[La/Fe]? [La/Fe] abundancephys.abundfloatnullable[Ce/Fe]? [Ce/Fe] abundancephys.abundfloatnullable[Nd/Fe]? [Nd/Fe] abundancephys.abundfloatnullable[s/Fe]? [s/Fe] abundancephys.abundfloatnullableRemarkRemarkmeta.notecharRefReference (1)meta.ref;pos.framecharSimbadSimbad 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.main