J/AJ/120/284ivo://CDS.VizieR/J/AJ/120/284doi:10.26093/cds/vizier.51200284CDSSiegel M.H.Majewski S.R.2023-04-06T16:50:40Z2000-10-30T23:08:48ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryWe present the first comprehensive catalog of variable stars in the Leo II dwarf spheroidal galaxy. We have identified 148 RR Lyrae type variables, of which 140 were amenable to derivation of variability parameters with our data. We have also confirmed the existence of four anomalous Cepheids as identified in previous studies. The average period of the RR Lyrae ab variables (0.62 days), the fraction of c variables (0.24), and the minimum period of the RR Lyrae ab variables (0.51 days) all define Leo II as an "Oosterhoff intermediate" galaxy. We have used the properties of these variables to derive a metallicity for Leo II of approximately [Fe/H]=-1.9.2000AJ....120..284Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/120/284CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/261/657 : Deep CCD photometry of Leo II (Demers+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/120/284https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/120/284http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/120/284https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/120/284https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/120/284http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/120/284GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/120/284/table1 (RR Lyrae variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/120/284/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/120/284/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/120/284/table1?GETtext/xml+votable180.050000true168.347333322.21569440.005555555555555556Cone search capability for table J/AJ/120/284/table2 (Anomalous Cepheids)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/120/284/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/120/284/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/120/284/table2?GETtext/xml+votable180.050000true168.343291722.14294440.0055555555555555566/28361https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/120/284?format=asciiOpticaldefaultJ/AJ/120/284/table1RR Lyrae variablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVNameVariable designation (VNNN), [SM2000] VNNN in Simbadmeta.idchar[SM2000]Star identification number, [SM2000] NNNN in Simbadmeta.id;meta.mainintXposX positionpixpos.cartesian.x;instr.detdoubleYposY positionpixpos.cartesian.y;instr.detdoubleRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainPer? Perioddtime.perioddoublenullableAVmag? Amplitude in the V passbandmagsrc.var.amplitudefloatnullableVmagV magnitudemagphot.mag;em.opt.VfloatTypeBailey (1902AnHar..38....1B) type (ab, abb, c or Unk.)meta.code;src.varchardlogPer? Pediod shift, {Delta}logP (1)floatnullableJ/AJ/120/284/table2Anomalous CepheidsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVNameVariable designation (VNNN)meta.idchar[SM2000]Star identification numbermeta.id;meta.mainintXposX positionpixpos.cartesian.x;instr.detdoubleYposY positionpixpos.cartesian.y;instr.detdoubleRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainPer? Perioddtime.perioddoublenullableAVmag? Amplitude in the V passbandmagsrc.var.amplitudefloatnullableVmagV magnitudemagphot.mag;em.opt.VfloatModePulsation modemeta.code;src.varcharSwopeSwope (1968, AJ, 73, S204) variable numbermeta.id;srccharJ/AJ/120/284/table4Julian dates and magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[SM2000]Star identification numbermeta.id;meta.mainintJDJulian Datedtime.epochdoubleVmagV band magnitudemagphot.mag;em.opt.Vdoublee_VmagUncertainty in Vmagmagstat.errordoubleJ/AJ/120/284/table5Dickens & Irwin (1993, Cat. <J/MNRAS/261/657>) stars that are nonvariablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[DI93]DI93 designation (VNNN), in <J/MNRAS/261/657>, [DI93] NNNN in Simbadmeta.idchar[SM2000]Star identification numbermeta.id;meta.mainintW-SWelch-Stetson (1993AJ....105.1813W) variability indexsrc.var.indexfloat