J/ApJ/850/137ivo://CDS.VizieR/J/ApJ/850/137doi:10.26093/cds/vizier.18500137CDSMartinez-Vazquez C.E.Monelli M.Bernard E.J.Gallart C.Stetson P.B.,Skillman E.D.Bono G.Cassisi S.Fiorentino G.McQuinn K.B.W.,Cole A.A.McConnachie A.W.Martin N.F.Dolphin A.E.Boylan-Kolchin M.,Aparicio A.Hidalgo S.L.Weisz D.R.2019-06-05T14:54:21Z2018-07-24T13:43:21ZCDS support team

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

cds-question@unistra.frvariable-starsgalaxieshst-photometryinfrared-photometryvisible-astronomyWide-band photometryWe present a census of variable stars in six M31 dwarf spheroidal satellites observed with the Hubble Space Telescope. We detect 870 RR Lyrae (RRL) stars in the fields of And I (296), II (251), III (111), XV (117), XVI (8), and XXVIII (87). We also detect a total of 15 Anomalous Cepheids, three eclipsing binaries, and seven field RRL stars compatible with being members of the M31 halo or the Giant Stellar Stream. We derive robust and homogeneous distances to the six galaxies using different methods based on the properties of the RRL stars. Working with the up-to-date set of Period-Wesenheit (I, B-I) relations published by Marconi et al., we obtain distance moduli of {mu}0=[24.49, 24.16, 24.36, 24.42, 23.70, 24.43]mag (respectively), with systematic uncertainties of 0.08mag and statistical uncertainties <0.11mag. We have considered an enlarged sample of 16 M31 satellites with published variability studies, and compared their pulsational observables (e.g., periods and amplitudes) with those of 15 Milky Way satellites for which similar data are available. The properties of the (strictly old) RRL in both satellite systems do not show any significant difference. In particular, we found a strikingly similar correlation between the mean period distribution of the fundamental RRL pulsators (RRab) and the mean metallicities of the galaxies. This indicates that the old RRL progenitors were similar at the early stage in the two environments, suggesting very similar characteristics for the earliest stages of evolution of both satellite systems.2017ApJ...850..137Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/850/137CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)J/AJ/110/2166 : Variables in Sextans dSph galaxy (Mateo+ 1995)J/AJ/117/1313 : NGC 6441 VI photometry (Layden+, 1999)J/AJ/120/284 : Variables in Leo II dwarf spheroidal (Siegel+, 2000)J/AJ/124/3222 : VI photometry of Draco and UMi galaxies (Bellazzini+, 2002)J/AJ/123/3154 : RV light curves of variable stars in Leo A (Dolphin+, 2002)J/AJ/124/1464 : Variable stars in Andromeda VI (Pritzl+, 2002)J/AJ/127/318 : BV photometry of Andromeda II variables (Pritzl+, 2004)J/A+A/431/1189 : BV photometry of NGC 6822 variables (Baldacci+, 2005)J/AJ/129/267 : RR Lyrae variables in NGC 5272 (Cacciari+, 2005)J/AJ/129/2232 : Variable stars in And I and And III (Pritzl+, 2005)J/other/RMxAA/44.365 : New variable stars in NGC 6366 (Arellano Ferro+, 2008)J/AJ/136/1921 : Variable stars of Draco dSph (Kinemuchi+, 2008)J/ApJ/674/L81 : Variable stars in dwarf galaxy CVn I (Kuehn+, 2008)J/ApJ/699/1742 : LCID project. I. Cetus and Tucana variables (Bernard+, 2009)J/ApJ/712/1259 : LCID project. II. Variables in IC1613 (Bernard+, 2010)J/AJ/141/171 : RR Lyrae stars in ultra-deep fields of M31 (Jeffery+, 2011)J/AJ/142/107 : Variable stars in NGC 1466 (Kuehn+, 2011)J/ApJ/758/11 : Bayesian distances to M31 satellites (Conn+, 2012)J/A+A/539/A138 : RR Lyr variable stars in M32 (Fiorentino+, 2012)J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)J/MNRAS/422/89 : Cetus dSph RR Lyrae (Monelli+, 2012)J/ApJ/756/121 : Variable stars in Her dwarf galaxy (Musella+, 2012)J/ApJ/779/7 : M31 dSph satellites. I. Variables in And XIX (Cusano+, 2013)J/ApJ/767/62 : RR Lyrae stars BV photometry in UMa I (Garofalo+, 2013)J/ApJ/779/102 : Metallicities of RGB stars in dwarf galaxies (Kirby+, 2013)J/ApJ/786/147 : RR Lyrae pop. in the Phoenix dwarf galaxy (Ordonez+, 2014)J/AcA/64/177 : VI LCs of Galactic Bulge RR Lyrae (Soszynski+, 2014)J/PASP/126/616 : Variable stars in Leo I dSph (Stetson+, 2014)J/ApJ/784/76 : RR Lyrae in ESO294-G010 and ESO410-G005 (Yang+, 2014)J/ApJ/814/71 : Carina project IX: UBVI of Carina variables (Coppola+, 2015)J/AcA/65/233 : OGLE Magellanic Clouds anomalous Cepheids (Soszynski+, 2015)J/AJ/152/170 : RRLs in globulars. IV. UBVRI in Omega Cen (Braga+, 2016)J/ApJ/829/26 : Variables in Andromeda XXV field. III. (Cusano+, 2016)J/ApJ/833/167 : PAndAS view of Andromeda satellites. II. (Martin+, 2016)J/MNRAS/462/4349 : Variable stars in Sculptor dSph (Martinez-Vazquez+, 2016)J/MNRAS/455/2163 : BI LCs of DDO210 pulsating variables (Ordonez+, 2016)J/ApJ/842/60 : Variable stars in Logal Group gal. III. (Monelli+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/850/137https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/850/137http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/850/137https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/850/137https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/850/137http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/850/137GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/850/137/table1 (Positions and structural parameters for the ISLAndS galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/850/137/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/850/137/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/850/137/table1?GETtext/xml+votable180.050000true11.41541738.03750.005555555555555556Cone search capability for table J/ApJ/850/137/log (Observing log for AndI, AndII, AndIII, AndXV, AndXVI and AndXXVIII dSph (tables A1/Table 9))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/850/137/log?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/850/137/log?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/850/137/log?GETtext/xml+votable180.050000true11.42833338.0396670.005555555555555556Cone search capability for table J/ApJ/850/137/stars (Pulsation parameters of the variable stars in AndI, AndII, AndIII, AndXV, AndXVI and AndXXVIII dSph (tables D4/Table 12))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/850/137/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/850/137/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/850/137/stars?GETtext/xml+votable180.050000true11.2884708337.9797750.0055555555555555566/2229 2234 2272 2604 2611 2628 135052.367228618189496e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/850/137?format=asciiInfraredOpticaldefaultJ/ApJ/850/137/table1Positions and structural parameters for the ISLAndS galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintdSphGalaxy namemeta.id;meta.maincharNsNumber of variable star in this galaxy (tables D4/Table 12)meta.numberintnullableRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainVMag[-11.6/-7.3] Absolute V-band magnitudemagphot.mag;em.opt.Vfloate_VMag[0.2/0.4] Negative uncertainty on VMagmagstat.error;phot.mag;em.opt.VfloatE_VMag[0.2/0.4] Positive uncertainty on VMagmagstat.error;stat.maxfloatE(B-V)[0.04/0.08] Reddeningmagphot.color.excessfloatell[0.1/0.6] Ellipticity ({epsilon}=1-b/a)src.ellipticityfloate_ell[0.02/0.1] ell uncertaintystat.errorfloatPA[30/140] Position angledegpos.posAnginte_PA[1/15] PA uncertaintydegstat.errorintrh[1/5.3] Half-light radiusarcminphys.angSize;srcfloate_rh[0.01/0.2] rh uncertaintyarcminstat.errorfloatu_rt[~] Uncertainty flag on rtmeta.code.errorcharrt[4.3/22] Tidal radiusarcminphys.angSize;srcfloate_rt[0.9/1.2]? rt uncertaintyarcminstat.errorfloatnullableRefReferences (1)meta.refcharNpNumber of photometry measurements for this galaxy (tables B2/Table 10)meta.numberintnullableObsDisplay the observation log for this galaxymeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharJ/ApJ/850/137/logObserving log for AndI, AndII, AndIII, AndXV, AndXVI and AndXXVIII dSph (tables A1/Table 9)Exp[987/1410] Exposure timestime.duration;obs.exposureintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintdSphGalaxy namemeta.id;meta.maincharCamHST camera of observation (ACS or WFC3)meta.id;instrcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFileFITS image filename as it appears in the HST archive (http://archive.stsci.edu/)meta.id;meta.fitscharObsObservation Datestime.epoch;obsnullableFiltFilter (F475W or F814W)meta.id;instr.filtercharJ/ApJ/850/137/photPhotometry of the variable stars in AndI, AndII, AndIII, AndXV, AndXVI and AndXXVIII dSph (tables B2/Table 10)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintdSphGalaxy namemeta.id.parentcharStarVariable star name (VNNN)meta.id;meta.maincharHJD-F475Heliocentric Julian Date; F475W mid-exposure: HJD-2400000dtime.epochdoubleF475Wmag[22.1/26.6]? HST F475W magnitudesmagphot.mag;em.opt.Bfloatnullablee_F475Wmag[0.01/0.8]? Uncertainty in F475Wmagmagstat.errorfloatnullableHJD-F814Heliocentric Julian Date; F814W mid-exposure: HJD-2400000dtime.epochdoubleF814Wmag[21.8/28.1]? HST F814W magnitudesmagphot.mag;em.opt.Ifloatnullablee_F814Wmag[0.01/9.7]? Uncertainty in F814Wmagmagstat.errorfloatnullableJ/ApJ/850/137/xidCross-identification with the Pritzl+ (2004, J/AJ/127/318 and 2005, J/AJ/129/2232) catalogs of variable stars in AndI, AndII and AndIII dSph (tables C3/Table 11)dSphGalaxy namemeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentifier in Pritzl+ (2004, J/AJ/127/318 or 2005, J/AJ/129/2232) (1)meta.id.crosscharPerP[0.2/1.7]? Period from Pritzl+ (2004, J/AJ/127/318 or 2005, J/AJ/129/2232)dtime.periodfloatnullableStarVariable star name in ISLAndS Galaxy (2)meta.id;meta.maincharPer[0.2/1.1]? Period, this work (2)dtime.periodfloatnullableNotesNotes on cross-identificationmeta.notecharJ/ApJ/850/137/starsPulsation parameters of the variable stars in AndI, AndII, AndIII, AndXV, AndXVI and AndXXVIII dSph (tables D4/Table 12)dSphGalaxy namemeta.id.parentcharTypeVariable Type (3)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarVariable star name in ISLAndS project (1)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPerCurrent Period, daysdtime.periodfloatF475Wmag[22.9/26.2] HST/Camera F475W intensity-averaged magnitudesmagphot.mag;em.opt.BfloatF475WAmp[0.02/1.8] HST/Camera F475W amplitudemagsrc.var.amplitudefloatF814Wmag[22.3/25.4] HST/Camera F814W intensity-averaged magnitudesmagphot.mag;em.opt.IfloatF814WAmp[0.04/1.1] HST/Camera F814W amplitudemagsrc.var.amplitudefloatBmag[23/26.4] Converted B band intensity-averaged magnitudes (2)magphot.mag;em.opt.BfloatBAmp[0.1/2] Converted B band amplitude (2)magsrc.var.amplitudefloatVmag[22.7/26] Converted V band intensity-averaged magnitudes (2)magphot.mag;em.opt.VfloatVAmp[0.09/1.6] Converted V band amplitude (2)magsrc.var.amplitudefloatIcmag[22.3/25.4] Converted Ic band intensity-averaged magnitudes (2)magphot.mag;em.opt.IfloatIcAmp[0.04/1.1] Converted Ic band amplitudemagsrc.var.amplitudefloatCamCamera used for F475W, F814W data (ACS or WFC3)meta.id;instrcharXIDLink to Pritzl+ (2005, J/AJ/129/2232) period measure (tables C3/Table 11)meta.ref.urlintnullableLCInteractive plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar