J/MNRAS/484/4833ivo://CDS.VizieR/J/MNRAS/484/4833doi:10.26093/cds/vizier.74844833CDSPrudil Z.Dekany I.Catelan M.Smolec R.Grebel E.K.Skarka M.2024-08-19T20:16:49Z2020-03-05T07:48:17ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyvariable-starsphotometryWe present a study of the Oosterhoff (Oo) dichotomy in the Galactic bulge using 8141 fundamental-mode RR Lyrae stars. We used public photometric data from the Optical Gravitational Lensing Experiment and the Vista Variables in the Via Lactea survey. We carefully selected fundamental-mode stars without modulation and without association with any globular cluster located towards the Galactic bulge. Subsequently, we identified and separated the Oosterhoff groups I and II on the basis of their period-amplitude distribution and using a relation fitted to the Oosterhoff I locus. Both Oosterhoff groups were then compared to observations of two bulge globular clusters and with models of stellar pulsation and evolution. We found that some of the variables classified as Oo II belong to a third Oo group. The Oosterhoff II variables are more metal-poor on average, more massive, and cooler than their Oosterhoff I counterparts. The analysis of their spatial distribution shows a systematic difference between foreground, central, and background regions in the occurrence of the Oosterhoff II group. The difference between the Oo I and II groups is also seen in their distance distributions with respect to the Galactic bar, but neither group is associated with the bar.2019MNRAS.484.4833Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/4833CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AcA/64/177 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/484/4833https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/484/4833http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/484/4833https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/484/4833https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/484/4833http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/484/4833GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/484/4833/oobulge (Oosterhoff dichotomy in the Galactic bulge)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/484/4833/oobulge?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/484/4833/oobulge?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/484/4833/oobulge?GETtext/xml+votable180.050000true258.75188-29.837610.0055555555555555564/1794-1795 1798 1803 1805 5/7174-7175 7198 7200 7205 7209-7211 7216-7217 7226-7227 7230 7243 7301 7312-7313 7316 10591 6/28683 28686-28687 28744 28746-28747 28750-28751 28784 28786-28787 28796 28798-28799 28804-28806 28816-28817 28819 28828-28829 28833 28835 28872-28873 28876-28877 28898-28899 28902-28903 28924 28926 28966 29056 29058-29059 29064-29066 29184-29185 29188 29200-29201 29260-29261 29268 29270 29272-29273 42357 42359 42363 42452-42453 42495 428377.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/484/4833?format=asciidefaultJ/MNRAS/484/4833/oobulgeOosterhoff dichotomy in the Galactic bulgerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE identification number, (OGLE BLG-RRLYR-NNNNN in Simbad)meta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainKsmagApparent magnitude in K band (VVV survey)magphot.mag;em.IR.KfloatAmpKAmplitude in K bandmagsrc.var.amplitudefloatOo[1/2] Oosterhoff type; OoI = 1, OoII = 2src.classint[Fe/H]Metallicity on JK scaleinstr.scalefloate_[Fe/H]Error on metallicitystat.error;phys.abund.Fefloat[Fe/H]carrMetallicity on Carretta scalephys.abund.FefloatVMAGAbsolute magnitude in V bandmagphys.magAbs;em.opt.Vdoublee_VMAGError on absolute magnitude in V bandmagstat.errordoubleIMAGAbsolute magnitude in I bandmagphys.magAbs;em.opt.Ifloate_IMAGError on absolute magnitude in I bandmagstat.errordoubleKMAGAbsolute magnitude in K bandmagphys.magAbs;em.IR.Kfloate_KMAGError on absolute magnitude in K bandmagstat.errordoubledDistancepcpos.distance;pos.heliocentricinte_dError on distancepcstat.errorintAkExtinction in K bandmagphys.absorption;em.IR.KdoubleSimbadSimbad column added by the CDSmeta.ref.urlchar