First-overtone RR Lyrae stars from OGLEJ/MNRAS/487/5584ivo://CDS.VizieR/J/MNRAS/487/5584doi:10.26093/cds/vizier.74875584CDSNetzel H.Smolec R.2024-08-19T20:19:14Z2023-01-23T13:31:15ZCDS support team
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
cds-question@unistra.frhorizontal-branch-starsvariable-starsmilky-way-galaxyvisible-astronomyWe analysed photometry for the up-to-date collection of the first-overtone RR Lyrae stars (RRc; 11415 stars) and double-mode RR Lyrae stars (RRd; 148 stars) towards the Galactic bulge from the Optical Gravitational Lensing Experiment (OGLE). We analysed frequency spectra of these stars in search for additional, low-amplitude signals, beyond the radial modes. We focused on stars from two groups: RR_0.61_ and RR_0.68_. In the first group, additional low-amplitude signals have periods shorter than the first-overtone period; period ratios fall in the 0.60-0.64 range. In the second group, additional low-amplitude signals have periods longer than the first-overtone period; period ratios tightly cluster around 0.68. Altogether we have detected 960 and 147 RR Lyrae stars that belong to RR_0.61_ and RR_0.68_ groups, respectively, which yield the incidence rates of 8.3 and 1.3 per cent of the considered sample. We discuss statistical properties of RR Lyrae stars with additional periodicities. For RR_0.61_ group we provide strong arguments that additional periodicities are connected to non-radial pulsation modes of degrees l=8 and l=9, as proposed by Dziembowski. We have also detected two double-periodic variables, with two close periodicities, similar to RR Lyrae variable V37 in NGC 6362. Properties of these peculiar variables, which may form a new group of double-mode pulsators, are discussed.2019MNRAS.487.5584Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/487/5584CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/487/5584https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/487/5584http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/487/5584https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/487/5584https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/487/5584http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/487/5584GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/487/5584/table1 (table with properties of RR_0.61_ stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/5584/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/5584/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/5584/table1?GETtext/xml+votable180.050000true260.8798092-29.34162940.005555555555555556Cone search capability for table J/MNRAS/487/5584/table2 (table with properties of RR_0.68_ stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/5584/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/5584/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/5584/table2?GETtext/xml+votable180.050000true263.8253725-27.22192470.0055555555555555564/1795 1798 5/7178-7179 7198 7205 7216-7217 7220-7221 6/28697 28699-28700 28702-28703 28705 28709-28711 28746 28784 28786 28796 28798 28801 28804-28805 28817 28819 28828-28829 28837 28839 28841-28842 28844-28845 28847-28848 28851 28854-28855 28857-28861 28872-28873 28876 28888-28889 28892 28904 28906-28908 28910-28911 28973 29249 29252 29261 29266-29267 42365 42367https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/487/5584?format=asciiOpticaldefaultJ/MNRAS/487/5584/table1table with properties of RR_0.61_ starsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (OGLE-BLG-RRLYR-NNNNN)meta.id;meta.maincharP1OFirst overtone perioddtime.perioddoublee_P1OError on P1Odstat.errordoublePxPeriod of the additional signaldtime.perioddoublee_PxError on Pxdstat.errordoublePx/P1ORatio between the two periodsarith.ratio;time.perioddoubleA1OAmplitude of the first overtonemagphot.magdoublee_A1OError on A1Omagstat.errordoubleAx/A1ORatio of amplitude of the additional signal to the amplitude of the first-overtone modesrc.var.amplitude;arith.ratiofloatRemarksRemarks (1)meta.notechar_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.main
J/MNRAS/487/5584/table2table with properties of RR_0.68_ starsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (OGLE-BLG-RRLYR-NNNNN)meta.id;meta.maincharP1OFirst overtone perioddtime.perioddoublee_P1OError on P1Odstat.errordoublePxPeriod of the additional signaldtime.perioddoublee_PxError on Pxdstat.errordoublePx/P1ORatio between the two periodsarith.ratio;time.perioddoubleA1OAmplitude of the first overtonemagphot.magdoublee_A1OError on A1Omagstat.errordoubleAx/A1ORatio of amplitude of the additional signal to the amplitude of the first-overtone modesrc.var.amplitude;arith.ratiofloatRemarksRemarks (1)meta.notechar_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.main