J/ApJ/588/824ivo://CDS.VizieR/J/ApJ/588/824doi:10.26093/cds/vizier.15880824CDSYanny B.Newberg H.J.Grebel E.K.Kent S.Odenkirchen M.Rockosi C.M.,Schlegel D.Subbarao M.Brinkmann J.Fukugita M.Ivezic Z.Lamb D.Q.,Schneider D.P.York D.G.2009-02-16T21:43:39Z2009-02-16T22:39:06ZCDS support team

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

cds-question@unistra.frhalo-starsradial-velocityvisible-astronomysloan-photometryWe present evidence for a ring of stars in the plane of the Milky Way, extending at least from l=180{deg} to 227{deg} with turnoff magnitude g~19.5; the ring could encircle the Galaxy. We infer that the low Galactic latitude structure is at a fairly constant distance of R=18+/-2kpc from the Galactic center above the Galactic plane and has R=20+/-2kpc in the region sampled below the Galactic plane. The evidence includes 500 Sloan Digital Sky Survey spectroscopic radial velocities of stars within 30{deg} of the plane. The velocity dispersion of the stars associated with this structure is found to be 27km/s at (l, b)=(198, -27), 22km/s at (l, b)=(225, 28), 30km/s at (l, b)=(188, 24), and 30km/s at (l, b)=(182, 27). The structure rotates in the same prograde direction as the Galactic disk stars but with a circular velocity of 110+/-25km/s. The narrow measured velocity dispersion is inconsistent with power-law spheroid or thick-disk populations.2003ApJ...588..824Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/588/824CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.sdss.org/ : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/588/824https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/588/824http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/588/824https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/588/824https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/588/824http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/588/824GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/588/824/table1 (Blue stars near (l,b) = (198{deg}, -27{deg}))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/588/824/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/588/824/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/588/824/table1?GETtext/xml+votable180.050000true70.59829-0.213426940.0055555555555555565/5737 6/22926 22927 22938 22945 22947 22956 22957 22960 229623.588997330618193e-19 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/588/824?format=asciiOpticaldefaultJ/ApJ/588/824/table1Blue stars near (l,b) = (198{deg}, -27{deg})recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainSDSS-IDIdentification in SDSS (1)meta.id;meta.maincharFIDFiber identification (2)meta.idchargmagThe SDSS g band magnitude (3)magphot.mag;em.opt.Bfloatg-r? The SDSS (g-r) color index (3)magphot.color;em.opt.B;em.opt.Rfloatnullableu-g? The SDSS (u-g) color index (3)magphot.color;em.opt.U;em.opt.BfloatnullableHRVHeliocentric corrected radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatEWCaIICa II K absorption line equivalent width in units of Angstroems0.1nmspect.line.eqWidth;em.IR.K;arith.ratiofloatCCut[0,1] Color cut in F-star box (4)meta.noteintE(B-V)The (B-V) excess at (RAdeg,DEdeg) (5)magphot.color.excessfloat