J/ApJ/805/189ivo://CDS.VizieR/J/ApJ/805/189doi:10.26093/cds/vizier.18050189CDSHyde E.A.Keller S.Zucker D.B.Ibata R.Siebert A.Lewis G.F.,Penarrubia J.Irwin M.Gilmore G.Lane R.R.Koch A.Conn A.R.,Diakogiannis F.I.Martell S.2017-12-15T10:55:09Z2015-10-21T11:49:48ZCDS support team

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

cds-question@unistra.frchemical-abundanceshalo-starsWrapping around the Milky Way, the Sagittarius stream is the dominant substructure in the halo. Our statistical selection method has allowed us to identify 106 highly likely members of the Sagittarius stream. Spectroscopic analysis of metallicity and kinematics of all members provides us with a new mapping of the Sagittarius stream. We find correspondence between the velocity distribution of stream stars and those computed for a triaxial model of the Milky Way dark matter halo. The Sagittarius trailing arm exhibits a metallicity gradient, ranging from -0.59 to -0.97dex over 142{deg}. This is consistent with the scenario of tidal disruption from a progenitor dwarf galaxy that possessed an internal metallicity gradient. We note high metallicity dispersion in the leading arm, causing a lack of detectable gradient and possibly indicating orbital phase mixing. We additionally report on a potential detection of the Sextans dwarf spheroidal in our data.2015ApJ...805..189Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/805/189CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/272 : RAVE 4th data release (Kordopatis+, 2013)III/265 : RAVE 3rd data release (Siebert+, 2011)I/317 : The PPMXL Catalog (Roeser+ 2010)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/145/163 : Catalog of stars in Sgr dwarf galaxy (Newby+, 2013)J/ApJ/751/130 : SDSS-DR7 red HB stars spectroscopic data (Shi+, 2012)J/ApJ/731/119 : BHB candidates in Sagittarius stream (Ruhland+, 2011)J/ApJ/708/1290 : A 2MASS view of the Sgr dSph. VI. (Chou+, 2010)J/PASP/121/1180 : Color panorama image of the Milky Way (Mellinger+, 2009)J/ApJ/670/346 : M giant stars in the Sgr dwarf galaxy. V. (Chou+, 2007)J/A+A/464/201 : RGB stars in Sagittarius streams (Monaco+, 2007)J/AJ/128/245 : M giant stars in the Sgr dwarf galaxy (Majewski+, 2004)J/AJ/127/2031 : Catalog of neighboring galaxies (Karachentsev+, 2004)J/A+A/414/503 : Abundances in the Sgr dSph (Bonifacio+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/805/189https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/805/189http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/805/189https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/805/189https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/805/189http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/805/189GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/805/189/table2 (The selected 106 likely Sagittarius Stream members with modified RAVE pipeline metallicity, surface gravity, and effective temperature values)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/805/189/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/805/189/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/805/189/table2?GETtext/xml+votable180.050000true29.5224167-1.75311110.0055555555555555566/48 49 51 54 275 276 278 279 4449 6261 17797 17799 17808 17810 23928 23930 24219 24222 24244 25917 25918 25919 25962 27207 27218 27224 28093 28136 28138 28203 28206 29337 30884 31397 44502 45001 45004 47014 47599 47940 47941https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/805/189?format=asciiOpticaldefaultJ/ApJ/805/189/table2The selected 106 likely Sagittarius Stream members with modified RAVE pipeline metallicity, surface gravity, and effective temperature valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/106] Running sequence numbermeta.id;meta.mainintmSimbad column added by the CDSmeta.code.multipintnullableRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainlambda[13.5/332.4] Sgr coordinate system {Lambda} (1)degstat.paramfloatB[-8.5/28] Sgr coordinate system B (1)degstat.paramfloatlogg[0.2/2.3] Log gravitylog(cm.s**-2)phys.gravityfloatTeff[3509/4891] Effective temperatureKphys.temperature.effectivefloat[M/H][-1.8/0.5] Metallicity [m/H]log(Sun)phys.abund.ZfloatRcoef[15.3/52.7] RAVE correlation coefficient (2)stat.fit.goodnessfloatPPMXLSources within 0.5" from the PPMXL catalog (I/317)meta.ref.urlintnullable2MSources within 0.5" from the 2MASS catalog (II/246)meta.ref.urlintnullable