J/ApJ/922/20ivo://CDS.VizieR/J/ApJ/922/20doi:10.26093/cds/vizier.19220020CDSBhardwaj A.Rejkuba M.Sloan G.C.Marconi M.Yang S.-C.2024-05-06T14:36:58Z2023-04-25T08:16:57ZCDS support team

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

cds-question@unistra.frvariable-starsinfrared-photometryvisible-astronomyphotometryglobular-star-clustersMessier 15 (NGC 7078) is an old and metal-poor post core-collapse globular cluster that hosts a rich population of variable stars. We report new optical (gi) and near-infrared (NIR, JKs) multi-epoch observations for 129 RR Lyrae, 4 Population II Cepheids (3 BL Herculis, 1 W Virginis), and 1 anomalous Cepheid variable candidate in M15 obtained using the MegaCam and the WIRCam instruments on the 3.6m Canada-France-Hawaii Telescope. Multi-band data are used to improve the periods and classification of variable stars, and determine accurate mean magnitudes and pulsational amplitudes from the light curves fitted with optical and NIR templates. We derive optical and NIR period-luminosity relations for RR Lyrae stars which are best constrained in the Ks band, m_Ks_=-2.333(0.054)logP+13.948(0.015) with a scatter of only 0.037mag. Theoretical and empirical calibrations of RR Lyrae period-luminosity-metallicity relations are used to derive a true distance modulus to M15: 15.196+/-0.026 (statistical) +/-0.039(systematic) mag. Our precise distance moduli based on RR Lyrae stars and Population II Cepheid variables are mutually consistent and agree with recent distance measurements in the literature based on Gaia parallaxes and other independent methods.2021ApJ...922...20Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/922/20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/cfht : Log of CFHT Exposures (CADC, 1979-)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)V/150 : Updated catalog of variable stars in globular clusters (Clement+ 2017)J/AJ/110/704 : RR Lyrae Variables in M15 (Silbermann+ 1995)J/AJ/119/2274 : JK Photometry of globular clusters M15 & M56 (Ivanov+, 2000)J/MNRAS/351/1204 : IR phot. of 10 Galactic Globular Clusters (Valenti+, 2004)J/AJ/129/267 : RR Lyrae variables in NGC 5272 (Cacciari+, 2005)J/AJ/129/2714 : JHK photometry of M92 variable stars (Del Principe+, 2005)J/AJ/130/2140 : Abund. and velocities in globular clusters (Pritzl+, 2005)J/other/RMxAA/42.75 : CCD RV LC of M15 RR Lyrae (Arellano Ferro+, 2006)J/MNRAS/371/1503 : Synthetic photometry of RR Lyr (Marconi+, 2006)J/MNRAS/370/1979 : JHKs phot. of T2Cs in globular clusters (Matsunaga+, 2006)J/AJ/135/1459 : Period of M15 variable stars (Corwin+, 2008)J/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010)J/AJ/142/187 : HST obs. of 7 Pop.II variable stars (Benedict+, 2011)J/MNRAS/439/3765 : RR Lyrae in 15 Galactic globular clusters (Dambis+, 2014)J/MNRAS/437/2307 : LMC anomalous Cepheid Ks light curves (Ripepi+, 2014)J/MNRAS/447/3342 : Galactic & LMC Cepheids Fourier parameters (Bhardwaj+, 2015)J/ApJ/814/71 : Carina project IX: UBVI of Carina variables (Coppola+, 2015)J/ApJ/807/127 : 70 RR Lyrae stars in the LMC bar (Muraveva+, 2015)J/AJ/150/129 : Swift UVOT stars survey. II. RRL in M3 & M15 (Siegel+, 2015)J/AcA/65/233 : OGLE Magellanic Clouds anomalous Cepheids (Soszynski+, 2015)J/A+A/605/A100 : VVV survey Galactic Bulge Pop. II Cepheids (Bhardwaj+, 2017)J/A+A/604/A29 : MC Type II & anomalous Cepheids PL & PR (Groenewegen+, 2017)J/A+A/604/A120 : omega Cen RR Lyrae and SX Phoenicis stars (Navarrete+, 2017)J/ApJ/841/84 : Theoretical framework for RR Lyrae. II. MIR (Neeley+, 2017)J/AJ/154/231 : Multi-epoch multi-band photometry of B1-392 (Saha+, 2017)J/AJ/154/85 : CTIO/DECam photometry of RR Lyrae stars in M5 (Vivas+, 2017)J/AJ/155/137 : RRLs in globulars. V. {omega} Cen NIR phot. (Braga+, 2018)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/MNRAS/481/1195 : Gaia DR2 RRL stars as standard candles (Muraveva+, 2018)J/AcA/68/89 : VI light curves of SMC type II Cepheids (Soszynski+, 2018)J/A+A/625/A1 : RR Lyrae variables NIR light-curve templates (Braga+, 2019)J/MNRAS/484/4833 : Oosterhoff dichotomy in Galactic bulge (Prudil+, 2019)J/AJ/160/220 : NIR LC of 234 RR Lyrae in Messier 3 (Bhardwaj+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/922/20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/922/20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/922/20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/922/20https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/922/20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/922/20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/922/20/table3 (Optical and NIR pulsation properties of RR Lyrae and Population II Cepheid variables in M15)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/922/20/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/922/20/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/922/20/table3?GETtext/xml+votable180.050000true322.4591712.174140.0055555555555555566/124058.609411244253969e-20 4.74824145408272e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/922/20?format=asciiOpticalInfrareddefaultJ/ApJ/922/20/table3Optical and NIR pulsation properties of RR Lyrae and Population II Cepheid variables in M15SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentifier (G1)meta.id;meta.maincharprimaryRAJ2000[322.39/322.62] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[12/12.32] Declination (J2000)degpos.eq.dec;meta.mainPC01[0/16.9] Period, Clement (see V/150)dtime.periodfloatPTW[0.28/16.85] Period, this work unless r_PTW is filleddtime.perioddoubler_PTW[1/3]? Reference for PTW (1)meta.ref;pos.frameintnullableTypeVariable type (2)meta.crypticchargmag[13.6/16.1]? CFHT/MegaCam intensity-averaged mean g-band magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[0.005/0.06]? Error in gmagmagstat.error;phot.magfloatnullableimag[12.7/15.9]? CFHT/MegaCam intensity-averaged mean i-band magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[0.005/0.05]? Error in imagmagstat.error;phot.magfloatnullableJmag[11.5/15.3]? CFHT/WIRCAM intensity-averaged mean J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.02/0.11]? Error in Jmagmagstat.error;phot.magfloatnullableKsmag[11/15]? CFHT/WIRCAM intensity-averaged mean Ks-band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag[0.02/0.06]? Error in Ksmagmagstat.error;phot.magfloatnullablegAmp[0.16/1.4]? Peak-to-peak amplitude in g-bandmagsrc.var.amplitudefloatnullablee_gAmp[0.007/0.08]? Error in gAmpmagstat.errorfloatnullableiAmp[0.08/0.85]? Peak-to-peak amplitude in i-bandmagsrc.var.amplitude;em.opt.Ifloatnullablee_iAmp[0.006/0.07]? Error in iAmpmagstat.errorfloatnullableJAmp[0.098/0.81]? Peak-to-peak amplitude in J-bandmagsrc.var.amplitude;em.IR.Jfloatnullablee_JAmp[0.03/0.12]? Error in JAmpmagstat.errorfloatnullableKsAmp[0.05/0.8]? Peak-to-peak amplitude in Ks-bandmagsrc.var.amplitude;em.IR.Kfloatnullablee_KsAmp[0.03/0.08]? Error in KsAmpmagstat.errorfloatnullableNpNumber of photometry measurements for this star (link to Table 2)meta.numberintnullableLCInteractive LC Plotmeta.ref.urlcharJ/ApJ/922/20/table2Time-series photometry of RR Lyrae and Population II Cepheid variables in M15IDID (G1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFiltFilter (g, i, J or Ks)meta.id;instr.filtercharMJD[55778.4/56544.4] Modified Julian Date (JD-2400000.5)dtime.epochdoubleomag[10.59/16.55] Observed magnitude in Filtermagphot.magfloate_omag[0.001/0.6] Uncertainty in omagmagstat.error;phot.magfloat