J/AcA/65/233ivo://CDS.VizieR/J/AcA/65/233doi:10.26093/cds/vizier.120650233CDSSoszynski I.Udalski A.Szymanski M.K.Pietrzynski G.Wyrzykowski L.,Ulaczyk K.Poleski R.Pietrukowicz P.Kozlowski S.Skowron J.Mroz P.,Pawlak M.2025-09-25T20:16:10Z2017-01-03T14:12:27ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsvariable-starsWe present a collection of 250 anomalous Cepheids (ACs) discovered in the OGLE-IV fields toward the Large (LMC) and Small Magellanic Cloud (SMC). The LMC sample is an extension of the OGLE-III Catalog of ACs published in 2008, while the SMC sample contains the first known bona fide ACs in this galaxy. The total sample is composed of 141 ACs in the LMC and 109 ACs in the SMC. All these stars pulsate in single modes: fundamental (174 objects) or first overtone (76 objects). Additionally, we report the discovery of four ACs located in the foreground of the Magellanic Clouds. These are the first unambiguously identified fundamental-mode ACs known in the Galactic field. We demonstrate that the coefficients {phi}21 and {phi}31 determined by the Fourier light curve decomposition are useful discriminators between classical Cepheids and ACs, at least in the LMC and in the field of the Milky Way. In the SMC, the light curve shapes and mean magnitudes of short-period classical Cepheids make them similar to ACs, which is a source of difficulties in the discrimination of both classes of pulsators. The presence of unidentified ACs in the catalogs of classical Cepheids may be partly responsible for the observed non-linearity of the period-luminosity relation observed for short-period Cepheids in the SMC. We compare spatial distributions of ACs, classical Cepheids and RR Lyr stars. We show that the distribution of ACs resembles that of old stars (RR Lyr variables), although in the LMC there are visible structures typical for young population (classical Cepheids): the bar and spiral arms. This may suggest that ACs are a mixture of relatively young stars and mergers of very old stars.2015AcA....65..233Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AcA/65/233CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)J/AcA/58/293 : Type-II and anomalous Cepheids in LMC (Soszynski+, 2008)J/AcA/58/313 : LMC Cepheids in OGLE and MACHO data (Poleski+, 2008)J/AcA/59/1 : LMC RR Lyrae stars VI light curves (Soszynski+, 2009)J/AcA/59/239 : LMC long-period variables VI light curves (Soszynski+, 2009)J/AcA/59/335 : LMC R CBr stars VI light curves (Soszynski+, 2009)J/AcA/60/1 : LMC delta Scuti stars VI light curves (Poleski+, 2010)J/AcA/60/17 : VI light curves of SMC classical Cepheids (Soszynski+, 2010)J/AcA/60/91 : VI light curves of SMC type II Cepheids (Soszynski+, 2010)J/AcA/60/165 : VI light curves of SMC RR Lyrae (Soszynski+, 2010)J/AcA/60/179 : LMC double periodic variables VI light curves (Poleski+, 2011)J/AcA/61/1 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2011)J/AcA/61/103 : VI light curves of LMC eclipsing binaries (Szymanski+, 2011)J/AcA/61/217 : VI light curves of SMC long-period variables (Soszynski+, 2011)J/AcA/61/285 : VI light curves of Galactic Bulge Cepheids (Soszynski+, 2011)J/AcA/63/115 : OLGE-III Galactic disk eclipsing binaries (Pietrukowicz+, 2013)J/AcA/63/323 : OGLE-III SMC eclipsing binary stars (Pawlak+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AcA/65/233https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AcA/65/233http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AcA/65/233https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AcA/65/233https://vizier.iucaa.in/viz-bin/votable?-source=J/AcA/65/233http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AcA/65/233GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AcA/65/233/lident (LMC identification of stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AcA/65/233/lident?https://vizier.iucaa.in/viz-bin/conesearch/J/AcA/65/233/lident?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AcA/65/233/lident?GETtext/xml+votable180.050000true69.3290417-69.81986110.005555555555555556Cone search capability for table J/AcA/65/233/sident (SMC identification of stars (2019 version))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AcA/65/233/sident?https://vizier.iucaa.in/viz-bin/conesearch/J/AcA/65/233/sident?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AcA/65/233/sident?GETtext/xml+votable180.050000true349.2390417-75.50250.0055555555555555565/8263 8272 8274 8280 8323 8329 9376 6/32837 32857 32877 32884 32891 32907 32916 32919 32936-32937 32942 32944-32945 32950 32952 32954-32955 32957 32993 33000 33002 33023 33028 33035 33038-33039 33043 33045-33047 33049 33057 33063 33068 33070 33072-33073 33075-33078 33081 33084 33092-33094 33100-33102 33105 33107-33108 33110 33115-33117 33119 33124 33127-33129 33131-33134 33137-33138 33194 33220 33248 33287 33290-33291 33297-33299 33302 33304-33305 33307-33308 33310 33312 33315 33323-33326 33328-33330 33333 33336-33338 33340 33346 33352 33359 33370 33381 33410 33413 33415 33418 33421 33424 33432 33444 33446-33447 33453-33454 33456 33799-33800 33813 37032 37034-37035 37408 37411 37416 37422-37423 37512 37514-37516 37518 37530 37538-37539 37545 38912 45321 45333 45335 45381 46085https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AcA/65/233?format=asciidefaultJ/AcA/65/233/lidentLMC identification of starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar's IDmeta.id;meta.maincharMode[F 1O] Mode of pulsations (F, 1O)meta.code;src.varcharRAJ2000Right ascension, equinox J2000.0pos.eq.ra;meta.mainDEJ2000Declination, equinox J2000.0pos.eq.dec;meta.mainOGLE4OGLE-IV IDmeta.idcharOGLE3OGLE-III IDmeta.idcharOGLE2OGLE-II IDmeta.idcharONameOther designation (from GCVS)meta.idcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AcA/65/233/lacepfLMC parameters of fundamental-mode anomalous Cepheids (2019 version)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCPlot of the light curvemeta.ref.urlcharStarStar's IDmeta.id;meta.mainchar<Imag>Intensity mean I-band magnitudemagphot.mag;em.opt.Ifloat<Vmag>? Intensity mean V-band magnitudemagphot.mag;em.opt.VfloatnullablePerPerioddtime.perioddoublee_PerUncertainty of perioddstat.errordoubleT0Time of maximum brightness (HJD-2450000)dtime.epochdoubleIAmpI-band amplitude (maximum-minimum)magsrc.var.amplitudefloatR21Fourier coefficient R_21stat.fit.paramfloatphi21Fourier coefficient phi_21stat.FourierfloatR31Fourier coefficient R_31stat.fit.paramfloatphi31? Fourier coefficient phi_31stat.FourierfloatnullableJ/AcA/65/233/lacep1oLMC parameters of first-overtone anomalous Cepheids (2019 version)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCPlot of the light curvemeta.ref.urlcharStarStar's IDmeta.id;meta.mainchar<Imag>Intensity mean I-band magnitudemagphot.mag;em.opt.Ifloat<Vmag>? Intensity mean V-band magnitudemagphot.mag;em.opt.VfloatnullablePerPerioddtime.perioddoublee_PerUncertainty of perioddstat.errordoubleT0Time of maximum brightness (HJD-2450000)dtime.epochdoubleIAmpI-band amplitude (maximum-minimum)magsrc.var.amplitudefloatR21Fourier coefficient R_21stat.fit.paramfloatphi21Fourier coefficient phi_21stat.FourierfloatR31Fourier coefficient R_31stat.fit.paramfloatphi31? Fourier coefficient phi_31stat.FourierfloatnullableJ/AcA/65/233/lremarksLMC remarks on selected objects (2019 version)StarStar's IDmeta.id;meta.maincharRemRemarksmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/AcA/65/233/sidentSMC identification of stars (2019 version)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar's IDmeta.id;meta.maincharMode[F 1O] Mode of pulsations (F, 1O)meta.code;src.varcharRAJ2000Right ascension, equinox J2000.0pos.eq.ra;meta.mainDEJ2000Declination, equinox J2000.0pos.eq.dec;meta.mainOGLE3OGLE-III IDmeta.idcharOGLE2OGLE-II IDmeta.idcharONameOther designation (from GCVS)meta.idcharOGLE4OGLE-IV IDmeta.idcharJ/AcA/65/233/sacepfSMC parameters of fundamental-mode anomalous Cepheids (2019 version)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCPlot of the light curvemeta.ref.urlcharStarStar's IDmeta.id;meta.mainchar<Imag>Intensity mean I-band magnitudemagphot.mag;em.opt.Ifloat<Vmag>? Intensity mean V-band magnitudemagphot.mag;em.opt.VfloatnullablePerPerioddtime.perioddoublee_PerUncertainty of perioddstat.errordoubleT0Time of maximum brightness (HJD-2450000)dtime.epochdoubleIAmpI-band amplitude (maximum-minimum)magsrc.var.amplitudefloatR21Fourier coefficient R_21stat.fit.paramfloatphi21Fourier coefficient phi_21stat.FourierfloatR31Fourier coefficient R_31stat.fit.paramfloatphi31? Fourier coefficient phi_31stat.FourierfloatnullableJ/AcA/65/233/sacep1oSMC parameters of first-overtone anomalous Cepheids (2019 version)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCPlot of the light curvemeta.ref.urlcharStarStar's IDmeta.id;meta.mainchar<Imag>Intensity mean I-band magnitudemagphot.mag;em.opt.Ifloat<Vmag>? Intensity mean V-band magnitudemagphot.mag;em.opt.VfloatnullablePerPerioddtime.perioddoublee_PerUncertainty of perioddstat.errordoubleT0Time of maximum brightness (HJD-2450000)dtime.epochdoubleIAmpI-band amplitude (maximum-minimum)magsrc.var.amplitudefloatR21Fourier coefficient R_21stat.fit.paramfloatphi21Fourier coefficient phi_21stat.FourierfloatR31Fourier coefficient R_31stat.fit.paramfloatphi31? Fourier coefficient phi_31stat.FourierfloatnullableJ/AcA/65/233/sremarksSMC remarks on selected objects (2019 version)StarStar's IDmeta.id;meta.maincharRemRemarksmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint