J/A+A/608/A100ivo://CDS.VizieR/J/A+A/608/A100doi:10.26093/cds/vizier.36080100CDSEscorza A.Boffin H.M.J.Jorissen A.Van Eck S.Siess L.,Van Winckel H.Karinkuzhi D.Shetye S.Pourbaix D.2017-12-14T06:36:34Z2017-12-12T09:58:53ZCDS support team

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

cds-question@unistra.frbarium-starsgiant-starshertzsprung-russell-diagramstellar-massesWith the availability of parallaxes provided by the Tycho-Gaia Astrometric Solution, it is possible to construct the Hertzsprung-Russell diagram (HRD) of barium and related stars with unprecedented accuracy. A direct result from the derived HRD is that subgiant CH stars occupy the same region as barium dwarfs, contrary to what their designations imply. By comparing the position of barium stars in the HRD with STAREVOL evolutionary tracks, it is possible to evaluate their masses, provided the metallicity is known. We used an average metallicity [Fe/H]=-0.25 and derived the mass distribution of barium giants. The distribution peaks around 2.5M_{sun}_, with a tail at higher masses up to 4.5M_{sun}_. This peak is seen as well in the mass distribution of a sample of normal K and M giants used for comparison and is associated with stars located in the red clump. When we compare these mass distributions, we see a deficit of low-mass (1-2M_{sun}_) barium giants. This is probably because low-mass stars reach large radii at the tip of the red giant branch, which may have resulted in an early binary interaction. Among barium giants, the high-mass tail is however dominated by stars with a barium index (based on a visual inspection of the barium spectral line) less than unity, i.e., with a very moderate barium line strength. We believe that these stars are not genuine barium giants, but rather bright giants (or supergiants) where the barium lines are strengthened because of a positive luminosity effect. Moreover, contrary to previous claims, we do not see differences between the mass distributions of mild and strong barium giants.2017A&A...608A.100Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/608/A100CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)I/337 : Gaia DR1 (Gaia Collaboration, 2016)J/A+A/326/722 : HIPPARCOS Ba stars (Mennessier+ 1997)J/A+A/372/245 : Infrared properties of barium stars (Chen+, 2001)J/A+A/454/895 : Abundances of 26 barium stars. I. (Allen+, 2006)J/A+A/454/917 : Abundances of 26 barium stars. II. (Allen+, 2006)J/A+A/525/A63 : Abundances in Ba stars (Allen+, 2011)J/AZh/79/909 : Chemical abundances in barium stars (Boyarchuk+, 2002)J/AZh/80/704 : Studies of classical barium stars (Antipova+, 2003)J/MNRAS/459/4299 : Barium stars abundances and kinematics (de Castro+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/608/A100https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/608/A100http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/608/A100https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/608/A100https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/608/A100http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/608/A100GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/608/A100/tablea1 (Effective temperatures and luminosities obtained for a barium and related stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/608/A100/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/608/A100/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/608/A100/tablea1?GETtext/xml+votable180.050000true1.342548.78781420.0055555555555555566/382 706 846 894 1017 1071 1236 1408 1410 1445 1566 1637 1847 2133 2251 2356 2364 2483 2499 2555 2639 3026 3122 3367 3408 3547 4041 4059 4423 4506 4574 5010 5109 5216 5382 5522 5529 5531 5569 5624 6009 7229 7238 7338 7795 7992 8278 8626 8767 9213 9216 9274 9427 9838 9874 10476 10997 11097 11618 12082 12289 12533 12544 12658 12771 12880 13029 13037 13052 13087 13091 13158 13244 13288 13332 13426 13534 13620 13687 13803 14064 14520-14521 14607 14690 14721 15363 15374 15441 15477 15481 15546 16100 16399 16892 16989 17020 17049 17091 17289 17398 17409 17432 17462 17487 17705 17763 17919 18204 18497 18506 18543 18575 18634 18659 18667 19060 19086 19466 19547 19560 19923 20057 20110 20205 20547 20740 20787 20804 20997 21011 21029 21035 21136 21310 21328 21445 21457 21608 21662 21690 21744 22015 22023 22037 22058 22154 22177 22214 22221 22233 22235 22260 22288 22328 22331 22462 22473 22655 23050 23122 23151 23224 23328 24003 24160 24570 24640 24799 24844 24877 25008 25051 25105 25198 25206 25323 25363 25631 25647 25835 25869 25904 25950 25984 26029 26089 26357 26630 26632 26655 26852 27013 27106 27198 27752 27958 28017 28149 28676 28721 28773 28959 29015 29117 29171 29359 29932 30233 30300 30344 30580 30640 30659 30730 30779 30873 31096 32023 32075 32086 32477 32519 32533 32597 32621 32694 32783-32784 32847 32980 33023 33096 33101 33180 33185 33208 33310 33410 33494 33621 33714 33834 33837 33849 33919 33966 34127 34131 34139 34216 34445 34462 34540 34659 34683-34684 34870 34961 35034 35286 35361 35442 35549 35600 35759 36069 36189 36537 36630 36759 36773 36839 36841 36986 37262 37287 37348 37452 37500-37501 37528 37663 37849 37984 38014 38061 38117 38133 38364 38398 38525 38545 38604 38618 38640 38711 38734 38780 38792 38806 38858 38882 38996 39030 39072 39195 39315 39342 39345 39391 39425 39427 39447 39449 39499 39560 39582 39623 39682 39766 39799 39851 39926 39977 39991 40004 40139 40143 40160 40271 40311 40494 40742 40795 40964 40999 41005 41208 41261 41270 41278-41279 41300 41382 41413 41453 41511 41619 41813 41815 41953 42004 42023 42101 42374 42915 42964 43009 43301 43321 43509 43535 43577 43665 43685 43778 43860 43912 43961 44176 44196 44389 44488 44653 44686 44693 44851 44885 44899 44933 45027 45045 45140 45248 45301 45346 45426 45429 45461 45529 45616 45676 45695 45745 45837 45900 46156 46352 46790 46891 46994 47071 47202 47207 47247 47252 47270 47311 47329 47337 47396 47522 47537 47629 47654 47657 47659 47706 47757 47794 47996 48138 48203 48274 48330 48411 48516 48546 48800 48998 49005https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/608/A100?format=asciidefaultJ/A+A/608/A100/tablea1Effective temperatures and luminosities obtained for a barium and related starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the starmeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainTypeStar typesrc.classcharPer? Orbital period (1)dtime.perioddoublenullablee? Orbital eccentricity (1)src.orbital.eccentricityfloatnullable[Fe/H]? Metallicity with respect to solarlog(Sun)phys.abund.Zfloatnullabler_[Fe/H]Reference for [Fe/H] (2)meta.refcharplxParallaxmaspos.parallax.trigfloate_plxError on the parallaxmasstat.error;pos.parallaxfloatr_plxReference for the parallax (3)meta.ref;pos.framecharb_T(0.0)Lower limit of Teff for grid with [Fe/H]=0.0Kphys.temperature.effective;stat.minintT(0.0)Effective temperature for grid with [Fe/H]=0.0Kphys.temperature.effectiveintB_T(0.0)Upper limit of Teff for grid with [Fe/H]=0.0Kphys.temperature.effective;stat.maxintb_L(0.0)Lower limit of luminosity for grid with [Fe/H]=0.0solLumphys.luminosity;stat.mindoubleL(0.0)Luminosity for grid with [Fe/H]=0.0solLumphys.luminositydoubleB_L(0.0)Upper limit of luminosity for grid with [Fe/H]=0.0solLumphys.luminosity;stat.maxdoubleb_T(-0.25)Lower limit of Teff for grid with [Fe/H]=-0.25Kphys.temperature.effective;stat.minintT(-0.25)Effective temperature for grid with [Fe/H]=-0.25Kphys.temperature.effectiveintB_T(-0.25)Upper limit of Teff for grid with [Fe/H]=-0.25Kphys.temperature.effective;stat.maxintb_L(-0.25)Lower limit of luminosity for grid with [Fe/H]=-0.25solLumphys.luminosity;stat.mindoubleL(-0.25)Luminosity for grid with [Fe/H]=-0.25solLumphys.luminositydoubleB_L(-0.25)Upper limit of luminosity for grid with [Fe/H]=-0.25solLumphys.luminosity;stat.maxdoubleb_T(-0.5)Lower limit of Teff for grid with [Fe/H]=-0.5Kphys.temperature.effective;stat.minintT(-0.5)Effective temperature for grid with [Fe/H]=-0.5Kphys.temperature.effectiveintB_T(-0.5)Upper limit of Teff for grid with [Fe/H]=-0.5Kphys.temperature.effective;stat.maxintb_L(-0.5)Lower limit of luminosity for grid with [Fe/H]=-0.5solLumphys.luminosity;stat.mindoubleL(-0.5)Luminosity for grid with [Fe/H]=-0.5solLumphys.luminositydoubleB_L(-0.5)Upper limit of luminosity for grid with [Fe/H]=-0.5solLumphys.luminosity;stat.maxdoubleSimbadSimbad column added by the CDSmeta.ref.urlchar