J/MNRAS/429/385ivo://CDS.VizieR/J/MNRAS/429/385doi:10.26093/cds/vizier.74290385CDSMatsunaga N.Feast M.W.Kawadu T.Nishiyama S.Nagayama T.Nagata T.,Tamura M.Bono G.Kobayashi N.2024-07-20T20:14:00Z2014-04-23T14:21:15ZCDS support team

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

cds-question@unistra.frvariable-starsphotometrypopulation-ii-starsWe report the result of our near-infrared survey of short-period variable stars (P<60d) in a field of view of 20'x30' towards the Galactic Centre (GC). Forty-five variables are discovered and we classify the variables based on their light-curve shapes and other evidence. In addition to 3 classical Cepheids reported previously, we find 16 type II Cepheids, 24 eclipsing binaries, 1 pulsating star with P=0.265d (RR Lyr or {delta} Sct) and 1 Cepheid-like variable whose nature is uncertain. Eclipsing binaries are separated into the foreground objects and those significantly obscured by interstellar extinction. One of the reddened binaries contains an O-type supergiant and its light curve indicates an eccentric orbit. We discuss the nature and distribution of type II Cepheids as well as the distance to the GC based on these Cepheids and other distance indicators. The estimates of R_0_(GC) we obtained based on photometric data agree with previous results obtained with kinematics of objects around the GC. Furthermore, our result gives support to the reddening law obtained by Nishiyama and collaborators, A_Ks_/E(H-Ks)=1.44, because a different reddening law would result in a rather different distance estimate.2013MNRAS.429..385Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/429/385CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AcA/61/285 : VI light curves of Galactic Bulge Cepheids (Soszynski+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/429/385https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/429/385http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/429/385https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/429/385https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/429/385http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/429/385GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/429/385/table2 (The catalogue of short-period variables detected towards the GC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/429/385/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/429/385/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/429/385/table2?GETtext/xml+votable180.050000true266.2379167-29.168250.005555555555555556Cone search capability for table J/MNRAS/429/385/table7 (2MASS counterparts for the OGLE-III type-II Cepheids (T2Cs) in the bulge)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/429/385/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/429/385/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/429/385/table7?GETtext/xml+votable180.050000true256.3347917-32.47155560.0055555555555555565/7179-7180 7182-7183 7192 7194 7205 7216-7217 6/28699 28704-28705 28708 28710-28711 28724-28725 28727 28782-28783 28792 28794-28795 28797 28799 28804 28817 28819 28827-28828 28830 28838 28844 28846-28847 28857 28872 28880 28882 28886-28888 28905 28907 28910-28911 29184 29203 29251-29252 29255 29260-29261 29264 29273 424907.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/429/385?format=asciiOpticaldefaultJ/MNRAS/429/385/table2The catalogue of short-period variables detected towards the GC2MASS2MASS ID (HHMMSSss+DDMMSSs)meta.idcharLCShow the light curvesmeta.ref.urlcharn_Seq[*] Individual note (1)meta.notecharJmag? Mean J magnitudemagphot.mag;em.IR.JfloatnullableSeq[1/45] Sequential numbermeta.id;meta.mainintprimaryHmag? Mean H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? Mean Ks magnitudemagphot.mag;em.IR.KfloatnullableDJ? Peak-to-valley amplitude in J bandmagsrc.var.amplitudefloatnullableDH? Peak-to-valley amplitude in H bandmagsrc.var.amplitudefloatnullableDKs? Peak-to-valley amplitude in Ks bandmagsrc.var.amplitudefloatnullableMfl[0/777] M flag (uncertainty) (2)meta.codeintPerPeriod (3)dtime.perioddoubleTypeVariable type (4)src.classchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar_RAPositions from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/429/385/table3Light variations for the catalogued variablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/45] Sequential numbermeta.id;meta.mainintMJD[52079.9/54545] Modified Julian datedtime.epochdoubleJmag? J magnitudemagphot.mag;em.IR.JfloatnullableHmag? H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? Ks magnitudemagphot.mag;em.IR.KfloatnullableJ/MNRAS/429/385/table72MASS counterparts for the OGLE-III type-II Cepheids (T2Cs) in the bulge2MASS2MASS ID (HHMMSSss-DDMMSSs)meta.idcharJmag? 2MASS J magnitudemagphot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.KfloatnullableQfl2MASS photometric quality flagsmeta.codecharBfl2MASS blend flagsmeta.codeint2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOGLEOGLE BLG-T2CEP number from Soszynski et al., 2011, Cat. J/AcA/61/285, <OGLE BLG-T2CEP-NNN> in Simbadmeta.id;meta.mainintPerPerioddtime.perioddoubleCfl2MASS confusion flagsmeta.codecharDphi? Phase corrections {Delta}{phi} to convert 2MASS magnitudes into mean magnitudesmagphot.mag;arith.difffloatnullable_RAPositions from Soszynski et al., 2011, Cat, J/AcA/61/285 (right ascension part)degpos.eq.ra;meta.main_DEPositions from Soszynski et al., 2011, Cat, J/AcA/61/285 (declination part)degpos.eq.dec;meta.main