J/A+A/647/A157ivo://CDS.VizieR/J/A+A/647/A157doi:10.26093/cds/vizier.36470157CDSSoto M.G.Jones M.I.Jenkins J.S.2023-02-07T07:24:29Z2021-03-26T12:22:04ZCDS support team

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

cds-question@unistra.froptical-observationcatalogsgiant-starsAs part of the search for planets around evolved stars, we can understand planet populations around significantly higher-mass stars than the Sun on the main sequence. This population is difficult to study any other way, particularly with radial-velocities since these stars are too hot and rotate too fast to measure precise velocities. Here we estimate stellar parameters for all of the giant stars from the EXPRESS project, which aims to detect planets orbiting evolved stars, and study their occurrence rate as a function of stellar mass. We analyse high resolution echelle spectra of these stars, and compute the atmospheric parameters by measuring the equivalent widths for a set of iron lines, using an updated method implemented during this work. Physical parameters are computed by interpolating through a grid of stellar evolutionary models, following a procedure that carefully takes into account the post-MS evolutionary phases. Probabilities of the star being in the red giant branch (RBG) or the horizontal branch (HB) are estimated from the derived distributions. Results: We find that, out of 166 evolved stars, 101 of them are most likely in the RGB phase, while 65 of them are in the HB phase. The mean derived mass is 1.41 and 1.87M_{sun}_ for RGB and HB stars, respectively. To validate our method, we compared our results with interferometry and asteroseismology studies. We find a difference in the radius with interferometry of 1.7%. With asteroseismology, we find 2.4% difference in logg, 1.5% in radius, 6.2% in mass, and 11.9% in age. Compared with previous spectroscopic studies, and find a 0.5% difference in Teff, 1% in logg, and 2% in [Fe/H]. We also find a mean mass difference with respect to the EXPRESS original catalogue of 16%. We show that the method presented here can greatly improve the estimates of the stellar parameters for giant stars compared to what was presented previously.2021A&A...647A.157Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/647/A157CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/615/A76 : Spectroscopic parameters of stars (SPECIES). I. (Soto+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/647/A157https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/647/A157http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/647/A157https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/647/A157https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/647/A157http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/647/A157GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/647/A157/tableb4 (Results for the EXPRESS sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A157/tableb4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A157/tableb4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A157/tableb4?GETtext/xml+votable180.050000true304.5058206-21.80995830.0055555555555555566/16433 16436 16496 16889 16956 17159 17183 17262 17285 17296 17361 17502 17551 17568 17608 17723 17764 18051 18512 20614 21174 21182 21221 21233 22553 22705 22710 22827 22841 23048 23057 23097 24703 24858 24863 25452 25531 25669 25924 26198 28908 29246 29296 29319 29657 29666 30100 30116 30770 31104 31310 31369 33338 33350 33879 34077 34255 34263 34343 34510 34730 34753 34773 34777 34847 34902 35225 35287 35382 35690 35740 35984 36292 36360 36374 36414 36579 36679 36689 38270 39009 39093 39183 40103 40865 41258 41316 41515 41594 41627 41701 41710 41726 41775 41975 42254 42271 42424 42462 42473 42604 42661 42750 42766 43074 43176 43178 43183 43227 43275 43386 43424 43430 43442 43602 43640 43840 43889 43894 43916 43922 43929 44158 44204 44240 44333 44347 44522 44642 45011 45036 45217 45307 45378 45413 45489 45552 46047 46110 46176 46308 46528 46714 46775 46960 47067 47078 47098 47312 47396 47433 47632 47688 47807 48094 48109 48134 48232 48262 48585 48615 48687 48694 48966 48987 49130https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/647/A157?format=asciiOpticaldefaultJ/A+A/647/A157/tableb1Iron line list usedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in Angstroms0.1nmem.wlfloatEPExcitation potentialeVphys.atmol.excitationfloatloggfLog of the oscillator strengthphys.atmol.oscStrengthfloatIon[FeI/FeII] Name of the speciesphys.atmol.ionStagecharIDIdentifier of the species (1)phys.atmol.ionStagefloatJ/A+A/647/A157/tableb4Results for the EXPRESS sampleInstSpectrograph usedmeta.id;instrcharTphTemperature from photometry (4)Kphys.temperaturefloate_TphUncertainty on Tph (4)Kstat.errorfloatTph-relRelation used in Tph (4)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRVDerived radial velocity of objectkm/sphys.veloc;pos.heliocentricdouble[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]Uncertainty on metallicitystat.error;phys.abund.FefloatTTemperatureKphys.temperaturefloate_TUncertainty on temperatureKstat.errorfloatloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggUncertainty on surface gravitylog(cm.s**-2)stat.errorfloatvtMicroturbulence velocitykm/sphys.veloc.microTurbfloate_vtUncertainty on vtkm/sstat.errorfloatnFeINumber of FeI lines usedmeta.numberintnFeIINumber of FeII lines usedmeta.numberintExcept[1/2] Exception code (1)meta.codeintvsiniRotational velocitykm/sphys.veloc.rotatfloate_vsiniUncertainty on vsinikm/sstat.error;phys.veloc.rotatfloatvmacMacroturbulence velocitykm/sphys.velocfloate_vmacUncertainty on vmackm/sstat.errorfloatMassStellar masssolMassphys.massfloatE_MassUpper mass uncertaintysolMassstat.error;stat.maxfloate_MassLower mass uncertaintysolMassstat.error;phys.massfloatAgeStellar ageGyrtime.agefloatE_AgeUpper age uncertaintyGyrstat.error;stat.maxfloate_AgeLower age uncertaintyGyrstat.error;time.agefloattriloggTrigonometric surface gravitylog(cm.s**-2)phys.gravityfloatE_triloggUpper trilogg uncertaintylog(cm.s**-2)stat.error;stat.maxfloate_triloggLower trilogg uncertaintylog(cm.s**-2)stat.errorfloatRadiusStellar radiussolRadphys.angSize;srcfloatE_RadiusUpper radius uncertaintysolRadstat.error;stat.maxfloate_RadiusLower radius uncertaintysolRadstat.error;phys.size.radiusfloatlogLStellar luminositylog(solLum)phys.luminosityfloatE_logLUpper luminosity uncertaintylog(solLum)stat.error;stat.maxfloate_logLLower luminosity uncertaintylog(solLum)stat.errorfloateepEquivalent Evolutionary Point (2)stat.fit.paramfloatE_eepUpper eep uncertainty (2)stat.error;stat.maxfloate_eepLower eep uncertainty (2)stat.errorfloatPpreMSProbability of pre-main sequence (3)stat.fit.goodnessfloatPMSProbability of main sequence (3)stat.fit.goodnessfloatPRGBProbability of red giant branch (3)stat.fit.goodnessfloatPHBProbability of horizontal branch (3)stat.fit.goodnessfloatPpostHBProbability of post-HB (3)stat.fit.goodnessfloatuseTc[y/n] Use Tphmeta.codecharusevt[y/n] Use fixed vtmeta.codecharusetrilogg[y/n] Use trilogg as loggmeta.codecharAVPhotometric extinction (5)magphys.absorptionfloat_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.mainNameObject namemeta.id;meta.maincharJ/A+A/647/A157/tableb5Results for the Sun spectraSpectrumSpectrum label (1)meta.id;meta.maincharAgeStellar ageGyrtime.agefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstSpectrograph/Instrument (2)meta.notechar[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]Uncertainty on metallicitystat.error;phys.abund.FefloatTTemperatureKphys.temperaturefloate_TUncertainty on temperatureKstat.errorfloatloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggUncertainty on surface gravitylog(cm.s**-2)stat.errorfloatvtMicroturbulence velocitykm/sphys.veloc.microTurbfloate_vtUncertainty on vtkm/sstat.errorfloatvsiniRotational velocitykm/sphys.veloc.rotatfloate_vsiniUncertainty on vsinikm/sstat.error;phys.veloc.rotatfloatvmacMacroturbulence velocity *km/sphys.velocfloate_vmacUncertainty on vmackm/sstat.errorfloatMassStellar masssolMassphys.massfloatE_MassUpper mass uncertaintysolMassstat.error;stat.maxfloate_MassLower mass uncertaintysolMassstat.error;phys.massfloatRadiusStellar radiussolRadphys.angSize;srcfloatE_RadiusUpper radius uncertaintysolRadstat.error;stat.maxfloate_RadiusLower radius uncertaintysolRadstat.error;phys.size.radiusfloatlogLStellar luminositylog(solLum)phys.luminosityfloatE_logLUpper luminosity uncertaintylog(solLum)stat.error;stat.maxfloate_logLLower luminosity uncertaintylog(solLum)stat.errorfloatE_AgeUpper age uncertaintyGyrstat.error;stat.maxfloate_AgeLower age uncertaintyGyrstat.error;time.agefloat