J/A+AS/137/273ivo://CDS.VizieR/J/A+AS/137/273CDSGerbaldi M.Faraggiana R.Burnage R.Delmas F.Gomez A.E.,Grenier S.1999-06-19T18:31:31Z1999-06-19T18:30:33ZCDS support team

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

cds-question@unistra.frdwarf-starsa-starsvisible-astronomymedium-band-photometrytrigonometric-parallaxHipparcos data for 71 nearby dwarf A0 stars were combined with other data, in particular with high resolution spectra to establish the HR diagram in this temperature range. Almost 30% of unknown binaries were detected and discarded before establishing the M-L relation for bright A0 V field stars. The relationship derived for these single stars is compared to the classical diagram derived from eclipsing binaries. The scatter of the latter is examined and the role of gravity is discussed. A good agreement is found between the evolution-based surface gravity logg_ev_ and the value of logg_ph_ obtained from photometric data.1999A&AS..137..273Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/137/273CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)V/50 : Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)J/ApJS/99/135 : Rotation and Spectral Peculiarities (Abt+ 1995)J/A+AS/122/51 : B to G stars calibration in Geneva photometry (Kunzli+, 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/137/273https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/137/273http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/137/273https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/137/273https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/137/273http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/137/273GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/137/273/table1The programme starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD (Cat. <III/135>) numbermeta.numberintprimaryHR? HR (Cat. <V/50>) numbermeta.idintnullableSpTypeSpectral Type (BSC, Cat. <V/50>) (1)src.spTypecharSpType2Spectral type (Abt and Morrell, 1995, Cat. <J/ApJS/99/135>)src.spTypecharDmag? Magnitude difference (BSC, Cat. <V/50>)phot.mag;arith.difffloatnullableSep? Angular separation (BSC, Cat. <V/50>)arcsecpos.angDistancefloatnullableBin? Binarity by specklearcsecpos.angDistance;src.orbitalfloatnullablen_Bin[*n] n: no detection, *: see Remarks columnmeta.notecharl_Vrot[<= ] Limit flag on Vrotmeta.code.errorcharVrot? Rotational velocity (BSC, Cat. <V/50>)km/sphys.veloc.rotatintnullablel_Vrot2Limit flag on Vrot2meta.code.errorcharVrot2? Rotational velocity (Abt and Morrell, 1995, Cat. <J/ApJS/99/135>)km/sphys.veloc.rotatintnullableu_Vrot2Uncertainty flag on Vrot2meta.code.errorcharRemRemarksmeta.notecharJ/A+AS/137/273/table2Photometric, astrometric data and atmospheric parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD (Cat. <III/135>) numbermeta.numberintprimaryb-y? (b-y) color from uvbyBeta photometric systemmagphot.color;em.opt.B;em.opt.Vfloatnullablem1? m1 index from uvbyBeta photometric systemmagphot.colorfloatnullablec1? c1 index from uvbyBeta photometric systemmagphot.colorfloatnullablebeta? Beta from uvbybeta photometric systemmagphot.color;em.line.HbetafloatnullableGroup? Group number for program UVBYBETA (Moon, 1985Ap&SS.117..261M)meta.codeintnullableE(b-y)? Reddening E(b-y)magphot.color.excessfloatnullableTeff? Teff from Moon and Dworetsky (1985MNRAS.217..305M) calibrationKphys.temperature.effectiveintnullablelogg? log g from Moon and Dworetsky (1985MNRAS.217..305M) calibrationlog(cm.s**-2)phys.gravityfloatnullableTeff2? Teff from Kunzli et al. (1997, Cat. <J/A+AS/122/51>) calibrationKphys.temperature.effectiveintnullablelogg2? log g from Kunzli et al. (1997, Cat. <J/A+AS/122/51>) calibrationlog(cm.s**-2)phys.gravityfloatnullablel_Broad[<= ] Limit flag on Broadmeta.code.errorcharBroad? Broadening value or lower value if intervalkm/sspect.line.broadintnullableBroad2? Upper broadening value when intervalkm/sspect.line.broadintnullableplx? Parallax from Hipparcos (Cat. <I/239>)maspos.parallax.trigfloatnullablee_plx? Relative error on the parallax from Hipparcos Catalogue (Cat. <I/239>)masstat.errorfloatnullableVMAGAbsolute magnitude Mvmagphys.magAbs;em.optfloate_VMAGError on Mvmagstat.errorfloatHIPHIP (Cat. <I/239>) numbermeta.idintJ/A+AS/137/273/table3Summary of the spectral analysisRemRemarksmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD (Cat. <III/135>) numbermeta.numberintprimaryCrossComments on the cross correlation curvemeta.notecharHgammaComments on the comparison between observed and computed Hgamma profilemeta.notecharMgIIComments on the comparison between observed and computed MgII profilespect.line.eqWidthcharmetalComments on the comparison between observed and computed metal linesmeta.notecharJ/A+AS/137/273/table4Parameters computed from the HR diagram and evolutionary tracks for the reduced sampleHIPHIP (Cat. <I/239>) numbermeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD (Cat. <III/135>) numbermeta.numberintprimarylogLLogarithm of the star luminositylog(solLum)phys.luminosityfloate_logLError on the log Llog(solLum)stat.errorfloatMassMass of the starsolMassphys.massfloate_MassError on the masssolMassstat.errorfloatRadRadius of the starsolRadphys.size.radiusfloatlogg(ev)Gravity surface calculated with the mass determined with stellar evolution modelslog(cm.s**-2)phys.gravityfloate_logg(ev)Error on logg(ev)log(cm.s**-2)stat.errorfloatlogAgeLogarithm of the agelog(yr)time.agefloate_logAgeError on the age%stat.errorint