J/other/RAA/17.7ivo://CDS.VizieR/J/other/RAA/17.76doi:10.26093/cds/vizier/dx/bhkhgCDSRen H.-B.Shi W.-B.Zhang X.Tang Y.-K.Zhang Y.Hou Y.-H.Wang Y.-F.2026-02-10T20:07:24Z2017-10-02T07:41:21ZCDS support team

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

cds-question@unistra.frmilky-way-galaxygiant-starsk-starsstellar-distanceThe Large Sky-Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 3 provided 341 691 K giant stars with stellar parameters. Based on the models of Law & Majewski (2010ApJ...714..229L), we identified 252 K giant stars in the leading stream associated with the Sagittarius (Sgr) dwarf galaxy. We obtained 132 K giant stars belonging to the trailing arm of Sgr using the model of Belokurov et al. We studied the metallicity distribution of member stars along the streams and found a flat gradient in the first wrap of the leading stream, -(0.88+/-0.3)x10^-3^dex/deg in the second wrap of the leading stream and -(1.2+/-0.3)x10^-3^dex/deg in the first wrap of the trailing stream. Moreover, we obtained a combined metallicity gradient with our sample and data from the literature. We also analyzed the properties of an overdensity, which is located in the leading stream of the Sgr.2017RAA....17...76Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/17.76CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/149 : LAMOST DR2 catalogs (Luo+, 2016)J/ApJ/805/189 : Highly likely members of the Sgr stream (Hyde+, 2015)http://dr3.lamost.org : LAMOST DR3 Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RAA/17.76https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RAA/17.76http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RAA/17.76https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RAA/17.76https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RAA/17.76http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RAA/17.76GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RAA/17.76/table1 (List of 384 K giant stars in Sgr streams)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RAA/17.76/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RAA/17.76/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RAA/17.76/table1?GETtext/xml+votable180.050000true60.78827.5270.0055555555555555565/4468 6/3 5 13-14 16-18 20-21 23-24 28 41-42 61 64 70-71 73-74 79 81 99-100 102 128 134 140-141 147 158 173 180 185 277 281-282 308 330 355 372 407 448 462 479 487 513 517 519 531 533 578 1058 1121 1161 1163 1330 4342 4478 4566-4567 4598 4603 4605 4671 4697 4700-4701 4711-4712 4738 4752 4754 4757 4761 4763-4764 4776 4801-4802 4821 4840 4847 4868 4881 4909 4911-4912 4916 4929 4935 4940 4944 4949 4953 4969 4983 4988 4997 5008 5011 5023 5043 5046 5062 5065 5087 5156-5157 5167 5176 5179 5190-5191 5195 5197 5203 5208 5223 5249 5254 5257-5258 5265 5267-5269 5277 5280 5284 5292 5312-5313 5344 5369 5378-5379 5423 5428 5482 5486 5517-5518 5553 5573 5635 5638 5643 5646 5667 5682 5711 5718 5743 5760 5832 6016 6151 6166-6167 6229 6279 6321 6324-6325 6328 6334 6363 6391 6408 6521 6542 6551 6692 6786 8379 8381 8742 8749 8835 8859 10245 10256 10342 10395 10400 10404 10765 17639 17648-17650 17652 17654-17656 17658-17660 17663 17728 17736 17743 17753 17764 17769 17773 17776-17777 17779 17781-17786 17788 17790-17791 17814 17847 17853 17863 17876-17877 17879 17881 17884 17893 17900 17905 17907 18000-18001 18005-18006 18013 22438 22505 22523 22526 23092 23135 23156 23163 23166 23199 23225-23228 23241 23266 23269 23271 23274 23289 23888 23890 23898 24036 24063 24144 24206 25842 25998-25999 26021 26028 26091 26098 26107 26176 26219 26221 26225 26267 26286 26309 26337 26370 26453 26463 26575 26609 27133 27483 27578 27707 27729-27730 27732 27734 27740-27741 27745 27761 27773 27845 27866 27893 27904 27914 27938 27948 27950 27959 27994 28037 28041 28057 28073 28092 28096 28098 28114 28125 28139 28234 28401 28404 28408 28494 28592 28609 36808 36860https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RAA/17.76?format=asciidefaultJ/other/RAA/17.76/table1List of 384 K giant stars in Sgr streamsMarkArm code (1)meta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameLAMOST lmjd-spid-fiber designationmeta.id;phys.atmol.configurationcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.main[Fe/H]Metallicityphys.abund.ZfloatDistDistance, derived by a Bayesian method (Liu et al., 2014ApJ...790..110L)kpcpos.distance;pos.heliocentricfloatVgsrGalactic Standard of Rest velocitykm/sphys.veloc;pos.galacticdoubleLambdaSgr longitude scale along the orbital plane, {Lambda}_{sun}_deginstr.scalefloatXGCGalactocentric X coordinatekpcpos.cartesian.x;pos.galactocentricfloatYGCGalactocentric Y coordinatekpcpos.cartesian.y;pos.galactocentricfloatZGCGalactocentric Z coordinatekpcpos.cartesian.z;pos.galactocentricfloatLAMOSTDisplay the LAMOSRT DR2 data (Luo et al. 2016, Cat. V/149)meta.ref.urlchar