J/ApJ/733/123ivo://CDS.VizieR/J/ApJ/733/123doi:10.26093/cds/vizier.17330123CDSNeugent K.F.Massey P.2019-12-31T08:50:50Z2012-12-12T11:46:20ZCDS support team

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

cds-question@unistra.frwolf-rayet-starsline-intensitiesvisible-astronomybroad-band-photometrystellar-spectral-typesastronomical-object-identificationWolf-Rayet (WR) stars are evolved massive stars, and the relative number of WC-type and WN-type WRs should vary with metallicity, providing a sensitive test of stellar evolutionary theory. The observed WC/WN ratio is much higher than that predicted by theory in some galaxies but this could be due to observational incompleteness for WN types, which have weaker lines. Previous studies of M33's WR content show a galactocentric gradient in the relative numbers of WCs and WNs, but only small regions have been surveyed with sufficient sensitivity to detect all of the WNs. Here, we present a sensitive survey for WRs covering all of M33, finding 55 new WRs, mostly of WN type. Our spectroscopy also improves the spectral types of many previously known WRs, establishing in one case that the star is actually a background quasar. The total number of spectroscopically confirmed WRs in M33 is 206, a number we argue is complete to ~5%, with most WRs residing in OB associations, although ~2% are truly isolated.2011ApJ...733..123Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/733/123CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/759/11 : Wolf-Rayet content of M31 (Neugent+, 2012)J/ApJ/705/1364 : MIR catalog of point sources in M33 (Thompson+, 2009)J/AJ/134/2474 : Halpha emission-line stars in dwarfs galaxies (Massey+, 2007)J/AJ/133/2393 : UBVRI in seven Local Group dwarfs galaxies (Massey+, 2007)J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)J/MNRAS/371/1405 : Variables in M33 (Hartman+, 2006)J/MNRAS/370/1429 : V photometry of bright stars of M33 (Shporer+, 2006)J/AJ/121/870 : BVI photometry of Variables in M33 (Macri+, 2001)J/PAZh/25/18 : Spectroscopy of Halpha blue stars in M 33 (Sholukhova+, 1999)J/ApJ/505/793 : New WR star in M33 (Massey+, 1998)J/ApJ/469/629 : UV-brightest stars of M33 and its nucleus (Massey+ 1996)J/AJ/110/2739 : H-alpha emitting regions in M33 (Calzetti+ 1995)J/ApJS/89/85 : Blue and red supergiants in M33 (Ivanov+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/733/123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/733/123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/733/123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/733/123https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/733/123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/733/123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/733/123/table2 (Non-Of and non-WR stars with emission)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/733/123/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/733/123/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/733/123/table2?GETtext/xml+votable180.050000true23.342041730.28094440.005555555555555556Cone search capability for table J/ApJ/733/123/table3 (New WR and Of-type spectroscopic results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/733/123/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/733/123/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/733/123/table3?GETtext/xml+votable180.050000true23.13362530.58955560.005555555555555556Cone search capability for table J/ApJ/733/123/table4 (Stars no longer considered WRs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/733/123/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/733/123/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/733/123/table4?GETtext/xml+votable180.050000true23.342041730.28094440.005555555555555556Cone search capability for table J/ApJ/733/123/table5 (WR stars in M33)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/733/123/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/733/123/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/733/123/table5?GETtext/xml+votable180.050000true23.13362530.58955560.005555555555555556Cone search capability for table J/ApJ/733/123/table6 (Isolated WR stars in M33)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/733/123/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/733/123/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/733/123/table6?GETtext/xml+votable180.050000true23.60462530.33063890.005555555555555556Cone search capability for table J/ApJ/733/123/table8 (Additional WR candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/733/123/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/733/123/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/733/123/table8?GETtext/xml+votable180.050000true23.26137530.19211110.0055555555555555566/2154 2155 2240 22413.322582951404819e-19 4.271926443021129e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/733/123?format=asciiOpticaldefaultJ/ApJ/733/123/table2Non-Of and non-WR stars with emissionMmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharVmagV-band magnitudemagphot.mag;em.opt.VfloatB-V(B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatU-B(U-B) color indexmagphot.color;em.opt.U;em.opt.BfloatTypeObject typesrc.classcharCommCommentmeta.notecharLGSSCross-match with M33 LGGS catalogs (J/AJ/131/2478 and J/AJ/133/2393) within 0.5"meta.ref.urlintnullableM33meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Star name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Star name (declination part)degpos.eq.dec;meta.mainJ/ApJ/733/123/table3New WR and Of-type spectroscopic resultsMmeta.ref.urlcharSpTMK spectral typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharr_SpTp? Reference (G1)(1)meta.ref;pos.frameintnullableSpTpPrevious MK spectral typesrc.spTypecharIDPrevious identificationmeta.id.crosscharlogW4? HeII{lambda}4686 or CIII{lambda}4650 equivalent width (2)log(0.1nm)spect.line.eqWidthfloatnullableFWHM4? Full width at half maximum (2)km/sspect.line.widthintnullablelogW5? CIV{lambda}5806 equivalent width (3)log(0.1nm)spect.line.eqWidthfloatnullableFWHM5? CIV{lambda}5806 FWHM (3)km/sspect.line.widthintnullableCommCommentmeta.notecharFName1Name of FITS file (spectrum) in subdirectory spec of Cat. J/ApJ/759/11meta.id;meta.fitscharFName2Name of second FITS file (alternative spectrum) in the subdirectory spec of Cat. J/ApJ/759/11meta.id;meta.fitscharLGSSCross-match with M33 LGGS catalogs (J/AJ/131/2478 and J/AJ/133/2393) within 0.5"meta.ref.urlintnullableM33meta.ref.urlintnullablespi370-915nm spectrum (non-interactive)meta.ref.urlcharSpPlot of spectrummeta.ref.urlcharSp2Plot of spectrummeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Star name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Star name (declination part)degpos.eq.dec;meta.mainJ/ApJ/733/123/table4Stars no longer considered WRsMmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharSpToOld MK spectral typesrc.spTypecharr_SpToOld spectral type reference (G1)meta.ref;pos.frameintSpTNew typesrc.spTypecharr_SpTNew type reference (G1)meta.ref;pos.frameintoIDOther identification(s)meta.idcharLGSSCross-match with M33 LGGS catalogs (J/AJ/131/2478 and J/AJ/133/2393) within 0.5"meta.ref.urlintnullableM33meta.ref.urlintnullable_RAPositions from Star name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Star name (declination part)degpos.eq.dec;meta.mainJ/ApJ/733/123/table5WR stars in M33Mmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharrhoNormalized distance from the center within the plane of M33 (1)pos.distancefloatSpTMK spectral typesrc.spTypecharf_SpT[i] Variable spectrum for J013332.64+304127.2 (2)meta.codecharr_SpTReference for spectral type (G1)meta.ref;pos.frameintVmagV-band magnitude from Massey et al. (2006, Cat. J/AJ/131/2478)magphot.mag;em.opt.Vfloatm47504750{AA} AB magnitude (3)magphot.mag;em.optfloatVMagAbsolute visual magnitude (4)magphys.magAbs;em.opt.VfloatM47504750{AA} absolute magnitude (4)magphys.magAbsfloatOBOB association (5)meta.id.parentcharf_OB[fo] Field star, or Outside association (6)meta.codechar[MJ98]Massey & Johnson (1998, Cat. J/ApJ/505/793) WR designation (<[MJ98] WR NNNA> in Simbad)meta.id.crosscharIDOther identification (7)meta.id.crosscharCommCommentmeta.notecharFName1Name of FITS file (spectrum) in subdirectory spec of Cat. J/ApJ/759/11meta.id;meta.fitscharFName2Name of second FITS file (alternative spectrum) in the subdirectory spec of Cat. J/ApJ/759/11meta.id;meta.fitscharLGSSCross-match with M33 LGGS catalogs (J/AJ/131/2478 and J/AJ/133/2393) within 0.5"meta.ref.urlintnullableM33meta.ref.urlintnullablespi370-915nm spectrum (non-interactive)meta.ref.urlcharSpPlot of spectrummeta.ref.urlcharSp2Plot of spectrummeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Star name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Star name (declination part)degpos.eq.dec;meta.mainJ/ApJ/733/123/table6Isolated WR stars in M33Mmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharrhoDistance from the center within the plane of M33pos.distancefloatSpTMK spectral typesrc.spTypecharLGSSCross-match with M33 LGGS catalogs (J/AJ/131/2478 and J/AJ/133/2393) within 0.5"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Star name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Star name (declination part)degpos.eq.dec;meta.mainJ/ApJ/733/123/table8Additional WR candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharVmagV-band magnitudemagphot.mag;em.opt.Vfloatm46504650{AA} magnitudemagphot.mag;em.optfloatLGSSCross-match with M33 LGGS catalogs (J/AJ/131/2478 and J/AJ/133/2393) within 0.5"meta.ref.urlintnullableM33meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Star name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Star name (declination part)degpos.eq.dec;meta.main