J/A+A/635/A66ivo://CDS.VizieR/J/A+A/635/A66doi:10.26093/cds/vizier.36350066CDSPrudil Z.Dekany I.Smolec R.Catelan M.Grebel E.K.Kunder A.2021-03-10T09:14:44Z2020-03-10T10:01:00ZCDS support team

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

cds-question@unistra.frvariable-starsphotometrymilky-way-galaxyWe present the most extended and homogeneous study carried out so far of the main and early shocks in 1485 RR Lyrae stars in the Galactic bulge observed by the Optical Gravitational Lensing Experiment (OGLE). We selected nonmodulated fundamental-mode RR Lyrae stars with good-quality photometry. Using a self- developed method, we determined the centers and strengths of main and early shock features in the phased light curves. We found that the positions of both humps and bumps are highly correlated with the pulsation properties of the studied variables. Pulsators with a pronounced main shock are concentrated in the low-amplitude regime of the period-amplitude diagram, while stars with a strong early shock have average and above-average pulsation amplitudes. A connection between the main and early shocks and the Fourier coefficients is also observed. In the color-magnitude diagram (CMD), we see a separation between stars with strong and weak shocks. Variables with a pronounced main shock cluster close to the fundamental red edge of the instability strip (IS), while stars with a strong early shock tend to clump in the center and near the fundamental blue edge of the IS. The appearance of shocks and their properties appear to be independent of the direction of evolution estimated from the period change rate of the studied stars. In addition, the differences in the period change rate between the two main Oosterhoff groups found in the Galactic bulge suggest that stars of Oosterhoff type I are located close to the zero-age horizontal branch while Oosterhoff type II variables are on their way toward the fundamental red edge of the instability strip, and have therefore already left the zero-age horizontal branch.2020A&A...635A..66Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/635/A66CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AcA/64/177 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2014)J/AcA/67/297 : OGLE Galactic center Cepheids and RR Lyrae (Soszynski+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/635/A66https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/635/A66http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/635/A66https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/635/A66https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/635/A66http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/635/A66GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/635/A66/tablea1 (The photometric and shock properties of RR Lyraes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/635/A66/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/635/A66/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/635/A66/tablea1?GETtext/xml+votable180.050000true263.7269708-27.58862470.0055555555555555565/7179 7182-7183 7194 7205 7216-7217 7220 6/28715 28723-28724 28726-28727 28780 28782-28783 28794-28795 28801 28804 28816-28817 28857 28873 28876 28888-288897.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/635/A66?format=asciidefaultJ/A+A/635/A66/tablea1The photometric and shock properties of RR LyraesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE-BLG-RRLYR-ID identifier, OGLE BLG-RRLYR-NNNNN in Simbadmeta.id;meta.mainintKmagK band magnitudemagphot.mag;em.IR.KfloatAmpKK band amplitudemagsrc.var.amplitudefloat[Fe/H]Photometric metallicityphys.abund.Zfloate_[Fe/H]Error on Photometric metallicitystat.error;phys.abund.FefloatVMAGAbsolute magnitude in Vmagphys.magAbs;em.opt.Vfloate_VMAGError on absolute magnitude in Vmagstat.errorfloatIMAGAbsolute magnitude in Imagphys.magAbs;em.opt.Ifloate_IMAGError on absolute magnitude in Imagstat.errorfloatKMAGAbsolute magnitude in Kmagphys.magAbs;em.IR.Kfloate_KMAGError on absolute magnitude in Kmagstat.errorfloathumpxx-coordinate of the humppos.cartesian.x;instr.detfloathumpyy-coordinate of the humppos.cartesian.y;instr.detfloatbumpxx-coordinate of the bumppos.cartesian.x;instr.detfloatbumpyy-coordinate of the bumppos.cartesian.y;instr.detfloatAmphumpAmplitude of the humpsrc.var.amplitudefloatAmpbumpAmplitude of the bumpsrc.var.amplitudefloatOO[1/2] Oosterhoff groupmeta.code.classinta2Parameter for calculation of the period changemeta.notedoublee_a2Error parameter for calculation of the period changestat.errordoubleClasshump[1/4] Visual classification of the hump (1)meta.code.classintClassbump[1/4] Visual classification of the bump (1)meta.code.classintSimbadSimbad column added by the CDSmeta.ref.urlchar_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