J/MNRAS/455/2216ivo://CDS.VizieR/J/MNRAS/455/2216doi:10.26093/cds/vizier.74552216CDSCatchpole R.M.Whitelock P.A.Feast M.W.Hughes S.M.G.Irwin M.,Alard C.2024-08-15T20:16:44Z2016-03-18T14:18:01ZCDS support team

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

cds-question@unistra.frgalaxy-planesmilky-way-galaxylate-type-starsvariable-starsinfrared-photometryWe report periods and JHKL observations for 643 oxygen-rich Mira variables found in two outer bulge fields at b=-7{deg} and l=+/-8{deg} and combine these with data on 8057 inner bulge Miras from the OGLE, Macho and 2MASS surveys, which are concentrated closer to the Galactic centre. Distance moduli are estimated for all these stars. Evidence is given showing that the bulge structure is a function of age. The longer period Miras (LogP>2.6, age~5Gyr and younger) show clear evidence of a bar structure inclined to the line of sight in both the inner and outer regions. The distribution of the shorter period (metal-rich globular cluster age) Miras, appears spheroidal in the outer bulge. In the inner region these old stars are also distributed differently from the younger ones and possibly suggest a more complex structure. These data suggest a distance to the galactic centre R_0_, of 8.9kpc, with an estimated uncertainty of ~0.4kpc. The possible effect of helium enrichment on our conclusions is discussed.2016MNRAS.455.2216Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/455/2216CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/455/2216https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/455/2216http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/455/2216https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/455/2216https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/455/2216http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/455/2216GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/455/2216/table2 (Mira positions and JHKL magnitudes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/455/2216/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/455/2216/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/455/2216/table2?GETtext/xml+votable180.050000true265.43997806-43.497268890.0055555555555555564/1810 5/7168 7170 7197 7235 10581 10583 10589 11946 6/28676-28678 28704 28796-28797 28935 28937-28939 28954 28976-28978 28982 28984-28985 29057 29060-29062 42311 42316-42318 42321-42323 42328-42329 42331 42353 47779 47790-477915.32389438366849e-20 1.769920256736783e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/455/2216?format=asciiInfrareddefaultJ/MNRAS/455/2216/table2Mira positions and JHKL magnitudesSimbadNameSimbad column added by the CDSmeta.idcharPerMira perioddtime.periodfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatJmagJ magnitude SAAO systemmagphot.mag;em.IR.JfloatHmagH magnitude SAAO systemmagphot.mag;em.IR.HfloatKmagK magnitude SAAO systemmagphot.mag;em.IR.KfloatLmagL magnitude SAAO systemmagphot.mag;em.IR.3-4umfloatAVInterstellar extinction in V bandmagphys.absorption;em.opt.Vfloat2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar