30 new Wolf-Rayet stars in M31J/AJ/166/68ivo://CDS.VizieR/J/AJ/166/68doi:10.26093/cds/vizier.51660068CDSNeugent K.F.Massey P.2024-11-06T20:18:57Z2024-05-17T07:20:09ZCDS support team
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
cds-question@unistra.frwolf-rayet-starsphotometrystellar-spectral-typesThe evolved massive star populations of the Local Group galaxies are generally thought to be well understood. However, recent work has suggested that the Wolf-Rayet (WR) content of M31 may have been underestimated. We therefore began a pilot project to search for new WRs in M31 and to reexamine the completeness of our previous WR survey, finished almost a decade prior. Our improved imaging data and spectroscopic follow-up confirmed 19 new WRs across three small fields in M31. These newly discovered WRs are generally fainter than the previously known sample due to slightly increased reddening as opposed to intrinsic faintness. From these findings, we estimate that there are another ~60 WRs left to be discovered in M31; however, the overall ratio of WN-type (nitrogen-rich) to WC-type (carbon-rich) WRs remains unchanged with our latest additions to the M31 WR census. We are in the process of extending this pilot WR survey to include the rest of M31, and a more complete population will be detailed in our future work.2023AJ....166...68Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/143 : Spectrophotometry of Wolf-Rayet Stars (Torres-Dodgen+ 1988)III/215 : 7th Catalog of Galactic Wolf-Rayet stars (van der Hucht, 2001)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)J/ApJ/339/53 : Planetary nebulae as standard candles. II. (Ciardullo+, 1989)J/ApJ/505/793 : New WR star in M33 (Massey+, 1998)J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)J/MNRAS/369/120 : Kinematic survey of planetary nebulae in M31 (Merrett+, 2006)J/ApJ/733/123 : The Wolf-Rayet content of M33 (NGC 598) (Neugent+, 2011)J/ApJ/759/11 : Wolf-Rayet content of M31 (Neugent+, 2012)J/ApJ/789/10 : M33 WR and Of-type Stars (Neugent+, 2014)J/AJ/152/62 : LGGS UBVRI photometry of M31 and M33 stars (Massey+, 2016)J/ApJ/863/181 : The fifth catalog of LMC Wolf-Rayet stars (Neugent+, 2018)J/ApJ/922/177 : 2MASS red supergiants in the SMC (Massey+, 2021)J/AJ/161/79 : Red supergiant stars in M31 and M33 (Massey+, 2021)J/A+A/664/A93 : Northern WNE star spectra (Dsilva+, 2022)J/ApJS/259/12 : Dust extinction law in nearby galaxies. I. M31 (Wang+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/68https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/166/68/table2 (Re-observed known WRs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/166/68/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/166/68/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/166/68/table2?GETtext/xml+votable180.050000true10.085166740.80213890.005555555555555556Cone search capability for table J/AJ/166/68/table3 (Spectroscopic results of new WR candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/166/68/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/166/68/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/166/68/table3?GETtext/xml+votable180.050000true10.0817916740.7090.0055555555555555566/2622-2623 2708-2709https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/166/68?format=asciidefaultJ/AJ/166/68/table2Re-observed known WRsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDPosition-based LGGS designationsmeta.id;meta.maincharSpTOldOld Spectral Type (1)src.spTypecharSpTNewNew Spectral Typesrc.spTypecharCommentsCommentsmeta.notechar_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.main
J/AJ/166/68/table3Spectroscopic results of new WR candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDPosition-based LGGS designations (1)meta.id;meta.maincharRAJ2000[0] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainEW[-900/-4]? Equivalent Width, Angstroms (2)0.1nmspect.line.eqWidthintnullableq_EWQuality flag for EWmeta.code.qual;spect.line.eqWidthcharFWHM[4/90]? Full Width at Half Maximum, Angstroms (2)0.1nmspect.line.widthfloatnullableq_FWHMQuality flag for FWHMmeta.code.qual;phys.angSizecharClassClassificationsrc.classchar