J/AJ/145/106ivo://CDS.VizieR/J/AJ/145/106doi:10.26093/cds/vizier.51450106CDSKodric M.Riffeser A.Hopp U.Seitz S.Koppenhoefer J.Bender R.,Goessl C.Snigula J.Lee C.-H.Ngeow C.-C.Chambers K.C.,Magnier E.A.Price P.A.Burgett W.S.Hodapp K.W.Kaiser N.,Kudritzki R.-P.2018-01-05T08:56:41Z2013-03-18T15:18:28ZCDS support team

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

cds-question@unistra.frastronomical-object-identificationinfrared-photometryvisible-astronomybroad-band-photometryvariable-starssurveysWe present a sample of Cepheid variable stars towards M31 based on the first year of regular M31 observations of the PS1 survey in the r_P1 and i_P1 filters. We describe the selection procedure for Cepheid variable stars from the overall variable source sample and develop an automatic classification scheme using Fourier decomposition and the location of the instability strip. We find 1440 fundamental mode (classical {delta}) Cep stars, 126 Cepheids in the first overtone mode, and 147 belonging to the Population II types. 296 Cepheids could not be assigned to one of these classes and 354 Cepheids were found in other surveys. These 2009 Cepheids constitute the largest Cepheid sample in M31 known so far and the full catalog is presented in this paper. We briefly describe the properties of our sample in its spatial distribution throughout the M31 galaxy, in its age properties, and we derive an apparent period-luminosity relation (PLR) in our two bands. The Population I Cepheids nicely follow the dust pattern of the M31 disk, whereas the 147 Type II Cepheids are distributed throughout the halo of M31. We outline the time evolution of the star formation in the major ring found previously and find an age gradient. A comparison of our PLR to previous results indicates a curvature term in the PLR.2013AJ....145..106Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/145/106CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/115/1894 : DIRECT M31A eclipsing binaries and Cepheids (Stanek+, 1998)J/AJ/115/1016 : DIRECT M31B eclipsing binaries and Cepheids (Kaluzny+, 1998)J/AJ/117/2810 : DIRECT M31C eclipsing binaries and Cepheids (Stanek+, 1999)J/AJ/118/346 : DIRECT M31D eclipsing binaries and Cepheids (Kaluzny+, 1999)J/AJ/118/2211 : DIRECT M31F eclipsing binaries and Cepheids (Mochejska+, 1999)J/AJ/126/175 : DIRECT M31Y eclipsing binaries and Cepheids (Bonanos+, 2003)J/A+A/445/423 : WeCAPP Survey. M31 variables (Fliri+, 2006)J/A+A/459/321 : BV photometry of M31 eclipsing binaries (Vilardell+, 2006)J/A+A/507/283 : Colors and extinction across the disk of M31 (Montalto+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/145/106https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/145/106http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/145/106https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/145/106https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/145/106http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/145/106GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/145/106/crossdir (*Cross identification with the DIRECT sample, Lucas, 2004ASPC..310...33M)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/145/106/crossdir?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/145/106/crossdir?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/145/106/crossdir?GETtext/xml+votable180.050000true11.3176941.786860.005555555555555556Cone search capability for table J/AJ/145/106/crossfli (*Cross identification with the WeCAPP sample, Fliri et al., 2006, Cat. J/A+A/445/423)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/145/106/crossfli?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/145/106/crossfli?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/145/106/crossfli?GETtext/xml+votable180.050000true10.8376741.137320.005555555555555556Cone search capability for table J/AJ/145/106/catalog (Cepheid parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/145/106/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/145/106/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/145/106/catalog?GETtext/xml+votable180.050000true9.8456140.959390.005555555555555556Cone search capability for table J/AJ/145/106/crossvil (*Cross identification with the Vilardell sample, Vilardell et al., 2007A&A...473..847V)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/145/106/crossvil?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/145/106/crossvil?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/145/106/crossvil?GETtext/xml+votable180.050000true10.6841.63360.0055555555555555566/2622 2623 2666 2705 2708 2709 2752https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/145/106?format=asciiOpticalInfrareddefaultJ/AJ/145/106/crossdir*Cross identification with the DIRECT sample, Lucas, 2004ASPC..310...33MSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPSOCepheid identifier, PSO JDDD.dddd+DD.dddd (1)meta.id;meta.maincharDIRECTCepheid identifier DIRECT project (2)meta.idcharTypeCepheid type (G1)meta.notecharPerPeriod derived from r-band datadtime.periodfloatPerDPeriod DIRECT projectdtime.periodfloatsepDistance between the 2 positionsarcsecpos;arith.difffloatRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainRADdegRight ascension (J2000) DIRECT projectdegpos.eq.raDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDEDdegDeclination (J2000) DIRECT projectdegpos.eq.decJ/AJ/145/106/crossfli*Cross identification with the WeCAPP sample, Fliri et al., 2006, Cat. J/A+A/445/423PerFPeriod WeCAPP projectdtime.periodfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPSOCepheid identifier, PSO JDDD.dddd+DD.ddddmeta.id;meta.maincharWeCAPPCepheid identifier in WeCAPP project, (Wendelstein Calar Alto Pixellensing Project), <[FRS2006] WeCAPP VNNNNN> in Simbadmeta.idintTypeCepheid type (G1)meta.notecharPerPeriod derived from r-band datadtime.periodfloatsepDistance between the 2 positionsarcsecpos;arith.difffloatRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainRAFdegRight ascension (J2000) WeCAPP projectdegpos.eq.raDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDEFdegDeclination (J2000) WeCAPP projectdegpos.eq.decJ/AJ/145/106/catalogCepheid parametersa-2rr-band fit parameter a_-2_ (2)magstat.fit.paramfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlcrShow the light curvesmeta.ref.urlcharlciShow the light curvesmeta.ref.urlcharPSOCepheid identifier, PSO JDDD.dddd+DD.ddddmeta.id;meta.maincharprimaryXISimbad column added by the CDSmeta.ref.urlcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainNr[60/183] Number of epochs r-bandmeta.numberintNi[44/143] Number of epochs i-bandmeta.numberintsigrSignificance of period determination in r-bandstat.fit.goodnessfloatsigiSignificance of period determination in i-bandstat.fit.goodnessfloatPerrPeriod r-banddtime.periodfloatPeriPeriod i-banddtime.periodfloate_PerPeriod error (1)dstat.errordoublea-5rr-band fit parameter a_-5_ (2)magstat.fit.paramfloate_a-5rr-band fit parameter a_-5_ error (2)magstat.errorfloata-4rr-band fit parameter a_-4_ (2)magstat.fit.paramfloate_a-4rr-band fit parameter a_-4_ error (2)magstat.errorfloata-3rr-band fit parameter a_-3_ (2)magstat.fit.paramfloate_a-3rr-band fit parameter a_-3_ error (2)magstat.errorfloate_a-2rr-band fit parameter a_-2_ error (2)magstat.errorfloata-1rr-band fit parameter a_-1_ (2)magstat.fit.paramfloate_a-1rr-band fit parameter a_-1_ error (2)magstat.errorfloata0rr-band fit parameter a_0_ (2)magstat.fit.paramfloate_a0rr-band fit parameter a_0_ error (2)magstat.errorfloata1rr-band fit parameter a_1_ (2)magstat.fit.paramfloate_a1rr-band fit parameter a_1_ error (2)magstat.errorfloata2rr-band fit parameter a_2_ (2)magstat.fit.paramfloate_a2rr-band fit parameter a_2_ error (2)magstat.errorfloata3rr-band fit parameter a_3_ (2)magstat.fit.paramfloate_a3rr-band fit parameter a_3_ error (2)magstat.errorfloata4rr-band fit parameter a_4_ (2)magstat.fit.paramfloate_a4rr-band fit parameter a_4_ error (2)magstat.errorfloata5rr-band fit parameter a_5_ (2)magstat.fit.paramfloate_a5rr-band fit parameter a_5_ error (2)magstat.errorfloata-5ii-band fit parameter a_-5_ (2)magstat.fit.paramfloate_a-5ii-band fit parameter a_-5_ error (2)magstat.errorfloata-4ii-band fit parameter a_-4_ (2)magstat.fit.paramfloate_a-4ii-band fit parameter a_-4_ error (2)magstat.errorfloata-3ii-band fit parameter a_-3_ (2)magstat.fit.paramfloate_a-3ii-band fit parameter a_-3_ error (2)magstat.errorfloata-2ii-band fit parameter a_-2_ (2)magstat.fit.paramfloate_a-2ii-band fit parameter a_-2_ error (2)magstat.errorfloata-1ii-band fit parameter a_-1_ (2)magstat.fit.paramfloate_a-1ii-band fit parameter a_-1_ error (2)magstat.errorfloata0ii-band fit parameter a_0_ (2)magstat.fit.paramfloate_a0ii-band fit parameter a_0_ error (2)magstat.errorfloata1ii-band fit parameter a_1_ (2)magstat.fit.paramfloate_a1ii-band fit parameter a_1_ error (2)magstat.errorfloata2ii-band fit parameter a_2_ (2)magstat.fit.paramfloate_a2ii-band fit parameter a_2_ error (2)magstat.errorfloata3ii-band fit parameter a_3_ (2)magstat.fit.paramfloate_a3ii-band fit parameter a_3_ error (2)magstat.errorfloata4ii-band fit parameter a_4_ (2)magstat.fit.paramfloate_a4ii-band fit parameter a_4_ error (2)magstat.errorfloata5ii-band fit parameter a_5_ (2)magstat.fit.paramfloate_a5ii-band fit parameter a_5_ error (2)magstat.errorfloatfitQrr-band fit quality factor (3)meta.code.qualfloatfitQii-band fit quality factor (3)meta.code.qualfloatnoFacrr-band noise factor (4)maginstr.paramfloatnoFacii-band noise factor (4)maginstr.paramfloatdecriserr-band decline/rise factor (5)instr.paramfloatdecriseii-band decline/rise factor (5)instr.paramfloatE(B-V)? B-V color excess (6)magphot.color.excessfloatnullablerP1r-band magnitudemagphot.mag;em.opt.Rfloate_rP1r-band magnitude errormagstat.errorfloatiP1i-band magnitudemagphot.mag;em.opt.Ifloate_iP1i-band magnitude errormagstat.errorfloatr0P1Extinction corrected r-band magnitude (7)magphot.mag;em.opt.Rfloati0P1Extinction corrected i-band magnitude (7)magphot.mag;em.opt.IfloatWIThe reddening-independent Wesenheit indexmagphot.color.reddFreefloate_WIWesenheit index errormagstat.errorfloatA21rAmplitude ratio in the r-band (8)magphot.mag;arith.ratiofloate_A21rAmplitude ratio error in the r-band (8)magstat.errorfloatP21rPhase difference in the r-band (8)radstat.fit.paramfloate_P21rPhase difference error in the r-band (8)radstat.errorfloatA21iAmplitude ratio in the i-band (8)magphot.mag;arith.ratiofloate_A21iAmplitude ratio error in the i-band (8)magstat.errorfloatP21iPhase difference in the i-band (8)radstat.fit.paramfloate_P21iPhase difference error in the i-band (8)radstat.errorfloatTypeCepheid type (G1)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharLCrCepheid light curve filename for the r-band, in subdirectory lcrmeta.id;meta.filecharLCiCepheid light curve filename for the i-band, in subdirectory lcimeta.id;meta.filecharJ/AJ/145/106/crossvil*Cross identification with the Vilardell sample, Vilardell et al., 2007A&A...473..847VTypeCepheid type (G1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPSOCepheid identifier, PSO JDDD.dddd+DD.ddddmeta.id;meta.maincharM31VCepheid identifier in Vilardell sample, (Cat. J/A+A/459/321)meta.idcharPerPeriod derived from r-band datadtime.periodfloatPerVPeriod Vilardell sampledtime.periodfloatsepDistance between the 2 positionsarcsecpos;arith.difffloatRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainRAVdegRight ascension (J2000) Vilardell sampledegpos.eq.raDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDEVdegDeclination (J2000) Vilardell sampledegpos.eq.dec