J/AJ/115/1856ivo://CDS.VizieR/J/AJ/115/1856doi:10.26093/cds/vizier.51151856CDSMateo M.Hurley-Keller D.Nemec J.2023-04-06T16:50:28Z1999-06-19T20:43:00ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomyWide-band photometryWe have discovered 20 dwarf Cepheids (DCs) in the Carina dwarf spheroidal galaxy from an analysis of individual CCD images obtained for a deep photometric study of the system. These short-period pulsating variable stars are by far the most distant (~100kpc) and faintest (V~23.0) DCs known. The Carina DCs obey a well-defined period-luminosity relation, allowing us to readily distinguish between overtone and fundamental pulsators in nearly every case. Unlike RR Lyrae stars, the pulsation mode turns out to be uncorrelated with light-curve shape, and the overtone pulsators do not tend toward shorter periods compared with the fundamental pulsators. Using the period-luminosity relations from Nemec, Nemec, & Lutz (1994, Cat. <J/AJ/108/222> and McNamara (1995AJ....109.1751M), we derive (m-M)_0_=20.06+/-0.12, for E(B-V)=0.025 and [Fe/H]=-2.0, in good agreement with recent, independent estimates of the distance/reddening of Carina. The error reflects the uncertainties in the DC distance scale, and in the metallicity and reddening of Carina. The frequency of DCs among upper-main-sequence stars in Carina is approximately 3%. The ratio of dwarf Cepheids to RR Lyrae stars in Carina is 0.13+/-0.10, though this result is highly sensitive to the star formation history of Carina and the evolution of the horizontal branch.1998AJ....115.1856Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/115/1856CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/115/1856https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/115/1856http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/115/1856https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/115/1856https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/115/1856http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/115/1856GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/115/1856/table2 (Properties of newly discovered variable stars in Carina)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/1856/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/1856/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/1856/table2?GETtext/xml+votable180.050000true100.260307-51.0308060.0055555555555555566/39097 391004.0234554602041486e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/115/1856?format=asciiOpticaldefaultJ/AJ/115/1856/table2Properties of newly discovered variable stars in CarinaPerPerioddtime.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[MHN98]Variable name (V1 to V20), [MHN98] VNN in Simbadmeta.id;meta.maincharField[1/3] Field numbermeta.id;obs.fieldintRAB1950Right ascension (B1950.0)pos.eq.ra;meta.mainDEB1950Declination (B1950.0)pos.eq.dec;meta.main<Vmag>Average V magnitudemagphot.mag;em.opt.Vfloat<Bmag>Average B magnitudemagphot.mag;em.opt.Bfloat<V>-<B><V>-<B> colour indexmagphot.color;em.opt.B;em.opt.VfloatE0Approximate time of minimum lightdphys.composition.massLightRatio;stat.mindoubleDVmagmagphot.magfloatMode[FO?] Mode (1)meta.notechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/AJ/115/1856/v1V1 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v2V2 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v3V3 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v4V4 BV photometryBand[BV] Bandinstr.bandpasscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v5V5 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v6V6 BV photometryField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v7V7 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v8V8 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v9V9 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v10V10 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v11V11 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v12V12 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v13V13 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v14V14 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v15V15 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v16V16 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v17V17 BV photometryBand[BV] Bandinstr.bandpasscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v18V18 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v19V19 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloatJ/AJ/115/1856/v20V20 BV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[1/3] Field numbermeta.id;obs.fieldintBand[BV] Bandinstr.bandpasscharHJDHeliocentric Julian datedtime.epochdoublemagMagnitude in Band filtermagphot.magfloate_magrms uncertainty on magmagstat.error;phot.magfloat