J/AJ/118/453ivo://CDS.VizieR/J/AJ/118/453doi:10.26093/cds/vizier.51180453CDSClement C.M.Shelton I.2023-04-06T16:50:36Z2013-02-26T12:44:01ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsccd-photometryCCD observations have been used to study 16 of the previously known variables in the Oosterhoff type II globular cluster M9. The properties of the RR Lyrae variables in M9 are compared with those in the Oosterhoff type I cluster M3. Methods devised by Simon, Jurcsik, & Kovacs have been used to derive physical parameters for the stars from Fourier analysis. The mean metal abundance so derived for M9, [Fe/H]=-1.77, is in good agreement with the metal abundance derived from spectroscopic observations. All methods for calculating the absolute magnitudes of RR Lyrae variables from Fourier coefficients indicate that the RR Lyrae variables in M9 are more luminous than those in M3. However, there are three RR Lyrae stars in M3 that may be as bright as the M9 stars. These three are thought to be in a more advanced evolutionary state than the other M3 RR Lyrae stars. Absolute magnitudes have also been derived for the RR Lyrae stars in M68 and M107. The different methods predict that RR Lyrae stars in metal-poor clusters are more luminous than those in more metal-rich clusters, but there are inconsistencies in the relative luminosities derived by the different methods.1999AJ....118..453Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/118/453CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/118/453https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/118/453http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/118/453https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/118/453https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/118/453http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/118/453GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/118/453/table2 (Elements of the variable stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/118/453/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/118/453/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/118/453/table2?GETtext/xml+votable180.050000true259.8262917-18.53935280.0055555555555555566/29291 293773.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/118/453?format=asciiOpticaldefaultJ/AJ/118/453/table2Elements of the variable starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number of the variable (VNN), <Cl* NGC 6333 SAW VNN> in Simbadmeta.id;meta.maincharTypeType of RR Lyraemeta.notecharXposX positionarcsecpos.cartesian.x;instr.detintYposY positionarcsecpos.cartesian.y;instr.detintLCPlot of the ligth curvemeta.ref.urlcharPerPerioddtime.perioddoubleAV? Absorption in V bandmagphot.mag;em.opt.Vfloatnullablee_AV? rms uncertainty on AVmagstat.errorfloatnullable<Vmag>? Mean V magnitudemagphot.mag;em.opt.VfloatnullableSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/AJ/118/453/table1Time-series CCD V photometry of 16 RR Lyrae stars in Messier 9 (NGC 6333)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian daydtime.epoch;pos.heliocentricdoubleV1mag? V magnitude of V1magphot.mag;em.opt.VfloatnullableV2magV magnitude of V2magphot.mag;em.opt.VfloatV4mag? V magnitude of V4magphot.mag;em.opt.VfloatnullableV5magV magnitude of V5magphot.mag;em.opt.VfloatV6mag? V magnitude of V6magphot.mag;em.opt.VfloatnullableV7mag? V magnitude of V7magphot.mag;em.opt.VfloatnullableV10mag? V magnitude of V10magphot.mag;em.opt.VfloatnullableV11mag? V magnitude of V11magphot.mag;em.opt.VfloatnullableV14magV magnitude of V14magphot.mag;em.opt.VfloatV15mag? V magnitude of V15magphot.mag;em.opt.VfloatnullableV16mag? V magnitude of V16magphot.mag;em.opt.VfloatnullableV17mag? V magnitude of V17magphot.mag;em.opt.VfloatnullableV18mag? V magnitude of V18magphot.mag;em.opt.VfloatnullableV19mag? V magnitude of V19magphot.mag;em.opt.VfloatnullableV20mag? V magnitude of V20magphot.mag;em.opt.VfloatnullableV21mag? V magnitude of V21magphot.mag;em.opt.Vfloatnullable