J/ApJ/697/207ivo://CDS.VizieR/J/ApJ/697/207doi:10.26093/cds/vizier.16970207CDSWillett B.A.Newberg H.J.Zhang H.Yanny B.Beers T.C.2017-12-21T15:26:29Z2011-06-22T11:33:06ZCDS support team

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

cds-question@unistra.frmetallicityradial-velocitysurveyshalo-starsproper-motionsWe use velocity and metallicity information from Sloan Digital Sky Survey and Sloan Extension for Galactic Understanding and Exploration stellar spectroscopy to fit an orbit to the narrow 63{deg} stellar stream of Grillmair and Dionatos (GD; 2006ApJ...643L..17G). The stars in the stream have a retrograde orbit with eccentricity e=0.33 (perigalacticon of 14.4kpc and apogalacticon of 28.7kpc) and inclination approximately i~35{deg}. In the region of the orbit which is detected, it has a distance of about 7-11kpc from the Sun. Assuming a standard disk plus bulge and logarithmic halo potential for the Milky Way stars plus dark matter, the stream stars are moving with a large space velocity of approximately 276km/s at perigalacticon. Using this stream alone, we are unable to determine if the dark matter halo is oblate or prolate. The metallicity of the stream is [Fe/H]=-2.1+/-0.1. Observed proper motions for individual stream members above the main sequence turnoff are consistent with the derived orbit. None of the known globular clusters in the Milky Way have positions, radial velocities, and metallicities that are consistent with being the progenitor of the GD-1 stream.2009ApJ...697..207Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/697/207CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/ApJ/692/1464 : Spectroscopy of Segue 1 (Geha+, 2009)J/MNRAS/397/1748 : Spectroscopic study of Segue 2 (Belokurov+, 2009)http://www.sdss.org/ : SDSS home pagehttp://segue.uchicago.edu/ : SEGUE home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/697/207https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/697/207http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/697/207https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/697/207https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/697/207http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/697/207GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/697/207/table2 (Spectra of GD-1 stream candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/697/207/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/697/207/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/697/207/table2?GETtext/xml+votable180.050000true125.68389111-0.439561110.0055555555555555566/4249 4255 4298 4538 4539 4947 4950 4951 4953 4957 5890 5891 5896 5906 5907 5910 5911 5912 5913 5915 5916 11445 11453 11488 21859 218653.588997330618193e-19 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/697/207?format=asciiOpticaldefaultJ/ApJ/697/207/table2Spectra of GD-1 stream candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlateSDSS plate numbermeta.id;instr.plateintMJDSDSS Modified Julian Datetime.epochintFiberSDSS fiber numbermeta.id;meta.mainintRegStream Detection Region Numberobs.fieldintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainGlonGalactic longitudedegpos.galactic.lonGlatGalactic latitudedegpos.galactic.latfloatVgsrGalactic standard of rest velocity (1)km/sphys.veloc;pos.galacticfloate_VgsrError in Vgsrkm/sstat.errorfloatRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatgmagDereddened g band magnitudemagphot.mag;em.opt.Bfloatu-gDereddened (u-g) color indexmagphot.color;em.opt.U;em.opt.Bfloatg-rDereddened (g-r) color indexmagphot.color;em.opt.B;em.opt.Rfloat[Fe/H]Metallicitylog(Sun)phys.abund.Zfloate_[Fe/H]Error in [Fe/H]log(Sun)stat.error;phys.abund.Fefloatlog(g)Log of the surface gravitylog(cm.s**-2)phys.gravityfloate_log(g)Error in log(g)log(cm.s**-2)stat.errorfloatpmGlonProper motion along galactic longitudemas/yrpos.pmfloatpmGlatProper motion along galactic latitudemas/yrpos.pmfloatDR7Details from SDSS-DR7 photometric catalog (Cat. II/294)meta.ref.urlcharSloanDisplay the SDSS data for this starmeta.ref.urlchar