J/ApJ/703/441ivo://CDS.VizieR/J/ApJ/703/441doi:10.26093/cds/vizier.17030441CDSDrout M.R.Massey P.Meynet G.Tokarz S.Caldwell N.2017-12-12T14:44:50Z2011-11-17T14:33:25ZCDS support team

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

cds-question@unistra.frsupergiant-starsradial-velocitygalaxiesphotometryspectroscopysurveysThe yellow supergiant (F- and G-type) content of nearby galaxies can provide a critical test of stellar evolution theory, bridging the gap between the hot, massive stars and the cool red supergiants. But, this region of the color-magnitude diagram is dominated by foreground contamination, requiring membership to somehow be determined. Fortunately, the large negative systemic velocity of M31, coupled to its high rotation rate, provides the means for separating the contaminating foreground dwarfs from the bona fide yellow supergiants within M31. We obtained radial velocities of ~2900 individual targets within the correct color-magnitude range corresponding to masses of 12M_{sun}_ and higher. A comparison of these velocities to those expected from M31's rotation curve reveals 54 rank-1 (near certain) and 66 rank-2 (probable) yellow supergiant members, indicating a foreground contamination >=96%. We expect some modest contamination from Milky Way halo giants among the remainder, particularly for the rank-2 candidates, and indeed follow-up spectroscopy of a small sample eliminates four rank 2's while confirming five others.2009ApJ...703..441Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/703/441CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/208 : BVRI CCD photometry in the field of M 31 (Magnier+ 1992)J/A+A/509/A61 : Long slit spectroscopy in M31 (Saglia+, 2010)J/ApJ/703/420 : Red supergiants in M31 (Massey et al., 2009)J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/703/441https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/703/441http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/703/441https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/703/441https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/703/441http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/703/441GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/703/441/table3 (*Stars with observed radial velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/703/441/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/703/441/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/703/441/table3?GETtext/xml+votable180.050000true9.258862540.162647220.0055555555555555566/2619 2622 2623 2666 2705 2708 2709 27523.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/703/441?format=asciiOpticaldefaultJ/ApJ/703/441/table3*Stars with observed radial velocitiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[DMM2009]Star identification (JHHMMSS.ss+DDMMSS.s; except for "Mag-NNNNNN") (G1)meta.id;meta.maincharprimaryn_[DMM2009]Simbad column added by the CDSmeta.code.membercharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVobsObserved radial velocitykm/sphys.veloc;pos.heliocentricfloatf_Vobs[c] Flag on Vobs (1)meta.codecharrTonry and Davis 1979AJ.....84.1511T r parameterstat.fit.paramfloatVexpExpected radial velocitykm/sphys.veloc;pos.heliocentricfloatVo-VeObserved minus expected radial velocitykm/sstat.fit.residualfloatVmagV band magnitudemagphot.mag;em.opt.VfloatB-VThe (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatRankSource rank (G2)meta.code.membercharLGGSDisplay the LGGS data from Massey et al. 2006 (Cat. J/AJ/131/2478) or data from Magnier et al., 1992, Cat. II/208meta.ref.urlcharJ/ApJ/703/441/table5Derived properties of potential M31 supergiantsCommCommentmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[DMM2009]Star identification (JHHMMSS.ss+DDMMSS.s; except for Mag-253496) (G1)meta.id;meta.maincharRank[1/2] Source rank (G2)meta.code.memberintVMAGAbsolute V-band magnitudemagphot.mag;em.opt.Vfloatu_VMAG[:] Uncertainty flag on VMAGmeta.code.errorcharlogTLog of effective temperaturelog(K)phys.temperature.effectivefloatu_logT[:] Uncertainty flag on logTmeta.code.errorcharlog(L)Bolometric luminosity from V band magnitudelog(solLum)phys.luminosityfloatu_log(L)[:] Uncertainty flag on luminositymeta.code.errorchar