J/other/ApSS/363ivo://CDS.VizieR/J/other/ApSS/363.127CDSMajaess D.Dekany I.Hajdu G.Minniti D.Turner D.Gieren W.2019-01-11T13:56:15Z2018-12-27T14:28:16ZCDS support team

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

cds-question@unistra.frgalactic-centervariable-starsinfrared-photometryThis study's objective was to exploit infrared VVV (VISTA Variables in the Via Lactea) photometry for high latitude RRab stars to establish an accurate Galactic Centre distance. RRab candidates were discovered and reaffirmed (n=4194) by matching Ks photometry with templates via chisq minimization, and contaminants were reduced by ensuring targets adhered to a strict period-amplitude (Ks) trend and passed the Elorietta et al. (2016A&A...595A..82E) classifier. The distance to the Galactic Centre was determined from a high latitude Bulge subsample (|b|>4, RGC=8.30+/-0.36kpc, random uncertainty is relatively negligible), and importantly, the comparatively low color-excess and uncrowded location mitigated uncertainties tied to the extinction law, the magnitude-limited nature of the analysis, and photometric contamination. Circumventing those problems resulted in a key uncertainty being the MKs relation, which was derived using LMC RRab stars (MKs=-(2.66+/-0.06)logP-(1.03+/-0.06), (J-Ks)0=(0.31+/-0.04)logP +(0.35+/-0.02), assuming mu0LMC=18.43). The Galactic Centre distance was not corrected for the cone-effect. Lastly, a new distance indicator emerged as brighter overdensities in the period-magnitude-amplitude diagrams analyzed, which arise from blended RRab and red clump stars. Blending may thrust faint extragalactic variables into the range of detectability.2018Ap&SS.363..127Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/ApSS/363.127CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/337 : VISTA Variables in the Via Lactea Survey DR1 (Saito+, 2012)II/348 : VISTA Variable in the Via Lactea Survey DR2 (Minniti+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/ApSS/363.127https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/ApSS/363.127http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/ApSS/363.127https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/ApSS/363.127https://vizier.iucaa.in/viz-bin/votable?-source=J/other/ApSS/363.127http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/ApSS/363.127GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/ApSS/363.127/final-v2 (Preliminary VVVDR4 aperture (source table) photometry for the RRab stars from the VISTA Data Flow System (VDFS) pipeline)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/ApSS/363.127/final-v2?https://vizier.iucaa.in/viz-bin/conesearch/J/other/ApSS/363.127/final-v2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/ApSS/363.127/final-v2?GETtext/xml+votable180.050000true266.986408-18.46202230.0055555555555555563/448 4/1796 1798 1799 1810 5/7190 7191 7210 7211 7214 7217 7220 7221 7234 7264 7301 7312 7313 7316 7317 10583 10589 10591 10619 10622 10623 11946 6/28754 28755 28758 28759 28816 28817 28820 28821 28834 28860 28862 28863 28864 28865 28867 28889 28892 28893 28906 28907 28910 28911 28940 28942 28943 28954 28976 29060 29062 29064 29065 29067 29184 29185 29189 29200 29201 29261 29272 29273 29276 29277 29279 29442 42325 42327 42353 42355 42361 42363 42470 42471 42482 42483 42486 42487 47790 47791 47802 47803 47806 478508.643406281242892e-20 1.6978332528839141e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/ApSS/363.127?format=asciiInfrareddefaultJ/other/ApSS/363.127/final-v2Preliminary VVVDR4 aperture (source table) photometry for the RRab stars from the VISTA Data Flow System (VDFS) pipelinePerPerioddtime.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJmagVISTA Jmag from the VVVDR4 source tablemagphot.mag;em.IR.Jfloate_JmagUncertainty tied to the VVVDR4 Jmagmagstat.error;phot.mag;em.IR.JfloatHmagVISTA Hmag from the VVVDR4 source tablemagphot.mag;em.IR.Hfloate_HmagUncertainty tied to the VVVDR4 Hmagmagstat.error;phot.mag;em.IR.HfloatKsmagVISTA Ksmag from the VVVDR4 source tablemagphot.mag;em.IR.Kfloate_KsmagUncertainty tied to the VVVDR4 Ksmagmagstat.error;phot.mag;em.IR.KfloatsourceIDVVVDR4 source IDmeta.id;meta.main