J/ApJ/795/108ivo://CDS.VizieR/J/ApJ/795/108doi:10.26093/cds/vizier.17950108CDSSkowron D.M.Jacyszyn A.M.Udalski A.Szymanski M.K.Skowron J.,Poleski R.Kozlowski S.Kubiak M.Pietrzynski G.Soszynski I.Mroz P.,Pietrukowicz P.Ulaczyk K.Wyrzykowski L.2017-07-18T15:23:21Z2017-05-31T15:24:34ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsstellar-populationsgiant-starsWe report the discovery of a young stellar bridge that forms a continuous connection between the Magellanic Clouds. This finding is based on number density maps for stellar populations found in data gathered by OGLE-IV that fully cover over 270 deg^2^ of the sky in the Magellanic Bridge area. This is the most extensive optical survey of this region to date. We find that the young population is present mainly in the western half of the MBR, which, together with the newly discovered young population in the eastern Bridge, form a continuous stream of stars connecting both galaxies along {delta}~-73.5 deg. The young population distribution is clumped, with one of the major densities close to the SMC and the other fairly isolated and located approximately mid-way between the Clouds, which we call the OGLE island. These overdensities are well matched by H I surface density contours, although the newly found young population in the eastern Bridge is offset by ~2 deg north from the highest H I density contour. We observe a continuity of red clump stars between the Magellanic Clouds which represent an intermediate-age population. Red clump stars are present mainly in the southern and central parts of the Magellanic Bridge, below its gaseous part, and their presence is reflected by a strong deviation from the radial density profiles of the two galaxies. This may indicate either a tidal stream of stars, or that the stellar halos of the two galaxies overlap. On the other hand, we do not observe such an overlap within an intermediate-age population represented by the top of the red giant branch and the asymptotic giant branch stars. We also see only minor mixing of the old populations of the Clouds in the southern part of the Bridge, represented by the lowest part of the red giant branch.2014ApJ...795..108Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/795/108CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/244 : OGLE General Catalog of Stars. I. (Szymanski+ 1996)J/A+A/551/A78 : The Magellanic Bridge Catalogue of Stars - MBCSJ/AcA/63/1 : OGLE-IV Magellanic Bridge Data supernovae (Kozlowski+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/795/108https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/795/108http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/795/108https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/795/108https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/795/108http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/795/108GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/795/108/table2 (Number densities for three stellar populations: the young population (YP), the red clump (RC), and the red giant branch (RGB) stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/795/108/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/795/108/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/795/108/table2?GETtext/xml+votable180.050000true19.5105-77.9370.0055555555555555563/515 4/2054 2055 2059 2072 2073 2074 2084 2085 2086 5/8229 8230 8231 8266 8267 8270 8300 8304 8325 8327 8348 8368 8384 6/32827 32829 32830 32831 32846 32847 32858 32909 32911 32913 32914 32915 32933 32935 32941 33058 33084 33086 33087 33130 33131 33134 33204 33205 33206 33208 33209 33210 33220 33221 33222 33224 33225 33226 33296 33297 33299 33332 33333 33335 33341 33343 33396 33397 33398 33400 33401 33429 33431 33437 33476 33477 33478 33480 33481 33482 33540 33541 33542 33544 33545 33546https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/795/108?format=asciidefaultJ/ApJ/795/108/table2Number densities for three stellar populations: the young population (YP), the red clump (RC), and the red giant branch (RGB) starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatYPYoung Population star number density (1)deg**-2meta.id;meta.mainintRCRed Clump star number density (1)deg**-2meta.idintRGBtopTop Red Giant Branch star number density (1)deg**-2meta.idintRGBmidMiddle Red Giant Branch star number density (1)deg**-2meta.idintRGBlowBottom Red Giant Branch star number density (1)deg**-2meta.idint