J/AJ/164/183ivo://CDS.VizieR/J/AJ/164/183doi:10.26093/cds/vizier.51640183CDSLeahy D.Buick M.Leahy C.2023-01-16T09:12:34Z2022-12-13T08:23:17ZCDS support team

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

cds-question@unistra.frstar-forming-regionsphotometryultraviolet-astronomystellar-agesstellar-massesThe Andromeda galaxy (M31) is an object of ongoing study with the Ultraviolet Imaging Telescope (UVIT) on AstroSat. UVIT far-UV (FUV) and near-UV (NUV) photometry is carried out here for a set of 239 clusters in the NE disk and bulge of M31 that overlap with the HST/PHAT survey. Padova stellar models were applied to derive ages, masses, metallicities, and extinctions for 170 clusters. The ages show a narrow peak at ~4Myr and a broad peak around 100Myr. log(Z/Z{sun}) values are mostly between -0.3 and +0.3. The 7 clusters in the bulge have a low metallicity and high mass. Most clusters are in the spiral arms and have metallicities in the range noted above. The youngest clusters mostly have high metallicity and are concentrated along the brightest parts of the spiral arms. The UVIT FUV and NUV data are sensitive to young stars and detect a new metal-rich peak in star formation in the disk at age ~4Myr.2022AJ....164..183Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/183CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/663/320 : IR-through-UV extinction curve (Fitzpatrick+, 2007)J/ApJS/215/9 : PHAT X. UV-IR photometry of M31 stars (Williams+, 2014)J/ApJ/802/127 : PHAT stellar cluster survey. II. AP catalog (Johnson+, 2015)J/ApJ/827/33 : PHAT. XVI. Star cluster masses and ages (Johnson+, 2016)J/ApJ/846/145 : PHAT. XIX. Formation history of M31 disk (Williams+, 2017)J/A+A/618/A156 : Stellar populations of central region of M31 (Saglia+, 2018)J/ApJS/250/23 : AstroSat/UVIT and Chandra X-ray sources in M31 (Leahy+, 2020)J/ApJS/247/47 : Ultraviolet survey of M31 with UVIT on AstroSat (Leahy+, 2020)J/AJ/162/199 : UV photometry of 548 variables stars in M31 (Leahy+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/183https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/183http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/183https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/164/183https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/164/183http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/164/183GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/164/183/table1 (UVIT photometry of M31 PHAT stellar clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/164/183/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/164/183/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/183/table1?GETtext/xml+votable180.050000true10.9397241.149290.0055555555555555566/2623 2666 27091.0590977079788917e-19 1.3189343879298211e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/164/183?format=asciiUVdefaultJ/AJ/164/183/table1UVIT photometry of M31 PHAT stellar clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPHATSource ID from Johnson+, 2015, J/ApJ/802/127 (1)meta.id;meta.mainintprimaryCompComposante namemeta.id.assoccharRAJ2000[10/12] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[41/42] Declination (J2000)degpos.eq.dec;meta.mainF148W[17.2/23.3]? AstroSat/UVIT F148W AB magnitudemagphot.mag;em.UV.100-200nmfloatnullablee_F148W[0.02/0.3]? Uncertainty in F148Wmag (2)magstat.errorfloatnullableF172M[16.8/23.1] AstroSat/UVIT F172M AB magnitudemagphot.mag;em.UV.100-200nmfloate_F172M[0.03/0.4] Uncertainty in F172Mmag (2)magstat.errorfloatF219M[17.2/23.4]? AstroSat/UVIT F219M AB magnitudemagphot.mag;em.UV.200-300nmfloatnullablee_F219M[0.03/0.4]? Uncertainty in F219Mmag (2)magstat.errorfloatnullableF169M[17.7/22.8]? AstroSat/UVIT F169M AB magnitudemagphot.mag;em.UV.100-200nmfloatnullablee_F169M[0.03/0.8]? Uncertainty in F169Mmag (2)magstat.errorfloatnullableSep[0.003/0.53] Separation (3)arcsecpos.angDistance;src.orbitalfloatReg[1/13] Regionobs.fieldintPropPrperties (table2)meta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharnullableJ/AJ/164/183/table2UVIT-PHAT stellar cluster propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPHAT[16/6947] PHAT Source IDmeta.id;meta.mainintchi2[1/222] Cluster model fitting {chi}^2^ valuestat.fit.chi2floatlogZ[-2.33/0.3] log, metallicity, Solar unitslog(Sun)phys.abund.Zfloate_logZ[0/1.8] Uncertainty in logZlog(Sun)stat.error;pos.cartesian.zfloatAge[6.6/9.26] log, Age, yrlog(yr)time.agefloate_Age[0/0.5] Uncertainty in logAgelog(yr)stat.error;time.agefloatMass[1.74/6.3] log, stellar mass in Solar unitslog(solMass)phys.massfloate_Mass[0/0.6] Uncertainty in logMlog(solMass)stat.error;phys.massfloatE(B-V)[0/0.57] Reddeningmagphot.color;em.opt.B;em.opt.Vfloate_E(B-V)[0/0.3] Uncertainty in E(B-V)magstat.errorfloat