J/MNRAS/446/1584ivo://CDS.VizieR/J/MNRAS/446/1584doi:10.26093/cds/vizier.74461584CDSJones O.C.McDonald I.Rich R.M.Kemper F.Boyer M.L.Zijlstra A.A.,Bendo G.J.2024-08-14T20:18:42Z2015-11-03T13:54:50ZCDS support team

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

cds-question@unistra.frgalaxieslate-type-starsinfrared-photometryWe investigate the population of cool, evolved stars in the Local Group dwarf elliptical galaxy M32, using Infrared Array Camera observations from the Spitzer Space Telescope. We construct deep mid-infrared colour-magnitude diagrams for the resolved stellar populations within 3.5 arcmin of M32's centre, and identify those stars that exhibit infrared excess. Our data are dominated by a population of luminous, dust-producing stars on the asymptotic giant branch (AGB) and extend to approximately 3 mag below the AGB tip. We detect for the first time a sizeable population of `extreme' AGB stars, highly enshrouded by circumstellar dust and likely completely obscured at optical wavelengths. The total dust-injection rate from the extreme AGB candidates is measured to be 7.5x10^-7^M_{sun}_/yr, corresponding to a gas mass-loss rate of 1.5x10^-4^M_{sun}_/yr. These extreme stars may be indicative of an extended star formation epoch between 0.2 and 5Gyr ago.2015MNRAS.446.1584Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/1584CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/104/1349 : Infrared-luminous giants in M32 (Freedman, 1992)J/ApJ/504/113 : F175W and F275W photometry of M31 and M32 (Brown+, 1998)J/ApJ/532/308 : Hot Horizontal Branch Stars in the Core of M32 (Brown+ 2000)J/ApJ/708/817 : RR Lyrae variables in M32 and M31 (Fiorentino+, 2010)J/ApJ/725/670 : Kinematics in the M32 nucleus (Seth, 2010)J/MNRAS/425/1459 : RR Lyrae in M32 (Sarajedini+, 2012)J/A+A/539/A138 : RR Lyr variable stars in M32 (Fiorentino+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/1584https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/1584http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/1584https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/446/1584https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/446/1584http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/446/1584GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/446/1584/table1 (Catalogue of point sources for M32)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/1584/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/1584/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/1584/table1?GETtext/xml+votable180.050000true10.737340.83750.0055555555555555566/2622-26232.483060040379131e-20 5.517906024225661e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/446/1584?format=asciiInfrareddefaultJ/MNRAS/446/1584/table1Catalogue of point sources for M32recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSTM32[1/1522] Sequential numbermeta.recordintNameSource name (JHHMMSS.ss+DDMMSS.ss)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.main[3.6]? IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? rms uncertainty on [3.6]magstat.errorfloatnullable[4.5]? IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? rms uncertainty on [4.5]magstat.errorfloatnullable[5.8]? IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? rms uncertainty on [5.8]magstat.errorfloatnullable[8.0]? IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? rms uncertainty on [8.0]magstat.errorfloatnullable