J/A+A/644/A140ivo://CDS.VizieR/J/A+A/644/A140doi:10.26093/cds/vizier.36440140CDSSurot F.Valenti E.Gonzalez O. A.Zoccali M.Soekmen E.Hidalgo S. L.,Minniti D.2021-09-09T11:03:28Z2020-12-10T07:29:20ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyinterstellar-reddeningA detailed study of the Galactic bulge stellar population necessarily requires an accurate representation of the interstellar extinction, particularly toward the Galactic plane and center, where severe and differential reddening is expected to vary on sub-arcmin scales. Although recent infrared surveys have addressed this problem by providing extinction maps across the whole Galactic bulge area, dereddened color-magnitude diagrams near the plane and center appear systematically undercorrected, prompting the need for higher resolution. These undercorrections affect any stellar study sensitive to color (e.g., star formation history analyses via color-magnitude diagram fitting), either making them inaccurate or limiting them to small and relatively stable extinction windows where this value is low and better constrained. This study is aimed at providing a high-resolution (2-arcmin to 10-arcsec) color excess map for the VVV bulge area in J-Ks color. We used the MW-BULGE-PSFPHOT catalogs, sampling 300deg^2^ across the Galactic bulge (|l|<10{deg} and -10{deg}<b<5{deg}) to isolate a sample of red clump and red giant branch stars, for which we calculated the average J-Ks color in a fine spatial grid in (l, b) space. We obtained an E(J-Ks) map spanning the VVV bulge area of roughly 300deg^2^, with the equivalent of a resolution between 1-arcmin for bulge outskirts (l<-6{deg}) to below 20-arcsec within the central |l|<1{deg}, and below 10-arcsec for the innermost area (|l|<1{deg} and |b|<3{deg}). The results are publicly available at http://basti-iac.oa-teramo.inaf.it/vvvexmap/2020A&A...644A.140Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/644/A140CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/629/A1 : Mapping the stellar age of the Milky Way (Surot+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/644/A140https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/644/A140http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/644/A140https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/644/A140https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/644/A140http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/644/A140GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/644/A140/ejkmap (VVVEXMAP-BULGE database)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/644/A140/ejkmap?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/644/A140/ejkmap?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/644/A140/ejkmap?GETtext/xml+votable180.050000true271.36345912-42.689383020.0055555555555555563/448 450-451 4/1796 1798-1799 1810 2653 2655 5/7190-7191 7234-7235 7264 7266 7272 7301 7312-7313 7316-7317 7319 10583 10589-10591 10617 10619 11946-11947 6/28752 28754-28755 28758-28759 28930 28954 28976 28978 29060-29062 29068 29070 29096-29098 29184-29185 29188-29189 29200-29201 29203 29260-29261 29272-29273 29440 29442 29448 29450 42325-42327 42331 42353 42355 42439 42445 42447 42836-42837 47778 47800 47802-47803 47806-47807 47850-47851https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/644/A140?format=asciiOpticaldefaultJ/A+A/644/A140/ejkmapVVVEXMAP-BULGE databaserecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLON[] Galactic longitude of the nodedegpos.galactic.lonindexedGLATGalactic latitude of the nodedegpos.galactic.latindexedE(J-Ks)Reddeningmagphot.color.excessfloate_E(J-Ks)Error on E(J-Ks)magstat.errorfloatres-avgAverage resolutionarcminpos.angResolution;stat.meanfloatres-maxMaximum resolutionarcminpos.angResolution;stat.maxfloatTileField ID following VVV designation (bNNN)meta.id;meta.mainchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed