J/A+A/700/A13ivo://CDS.VizieR/J/A+A/700/A13doi:10.26093/cds/vizier.37000013CDSShi W.B.Liu Z.S.Chen Y.Q.Zhao J.K.Zhao G.Li G.W.Wang P.,Yan H.H.Wu X.H.2025-08-27T20:01:16Z2025-07-29T07:26:55ZCDS support team

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

cds-question@unistra.frmilky-way-galaxygiant-starsradial-velocitymetallicityvisible-astronomyTo explore the metallicity and kinematic properties of stellar streams, we selected the members of the GD-1 stream and Kshir stream, and conducted out a detailed analysis of the member stars of the stellar streams. By utilizing the spectral data from LAMOST DR10 and SDSS DR16, and integrating them with the astrometric data from Gaia DR3, we identified the member stars of the stellar streams through an analysis of their geometric space, velocity space, and metallicity properties. Based on these identified member stars, we discovered and summarized the metallicity and kinematic properties of the stellar streams. 152 members and 68 members were identified in the GD-1 stream and the Kshir stream, respectively. The average metallicity of the GD-1 stream is [Fe/H]=-2.19+/-0.10dex. The known gaps at phi_1_=-20{deg} and phi_1_=-40{deg} were confirmed, and a possible new gap at phi_1_=-60{deg} was found. For the first time, we found that the formation reasons of the gaps are that there is a large velocity difference on both sides of the gaps and the velocities at both ends of the stream are reversed. These velocity characteristics may be due to the gaps being near a "turnaround" point in the stream orbit, or the stellar stream was significantly impacted by the massive Sagittarius 3Gyr ago. The average metallicity of the Kshir stream is [Fe/H]=-1.65+/-0.13dex. The radial velocity and proper-motion distributions along the Kshir stream are consistent with those of the GD-1 stream. Presumably, they are orbital wraps of the same structure.2025A&A...700A..13Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A13CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)V/156 : LAMOST DR7 catalogs (Luo+, 2019)J/ApJ/869/122 : SDSS-DR14 and LAMOST DR6 spectra in GD-1 stream (Li+, 2018)J/ApJ/877/13 : Member stars of the GD-1 tidal stream (Huang+, 2019)J/MNRAS/486/2995 : GD-1 stellar stream (Malhan+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/700/A13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/700/A13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/700/A13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/700/A13https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/700/A13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/700/A13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/700/A13/tablea1 (The members of GD-1 stream)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A13/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A13/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A13/tablea1?GETtext/xml+votable180.050000true140.71725.7850.005555555555555556Cone search capability for table J/A+A/700/A13/tablea2 (The members of Kshir stream)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A13/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A13/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A13/tablea2?GETtext/xml+votable180.050000true149.313-0.5030.0055555555555555565/1063 1473 6/4139 4225 4228 4248-4249 4298 4369 4374 4428 4442 4464 4466 4468 4473 4538-4539 4928 4932 4935 4946-4947 4950-4951 4953 4957 5154 5162 5178 5248-5249 5252-5253 5255 5264 5273 5279 5301 5314 5338 5348 5363-5364 5539-5540 5549 5554 5561 5610 5634 5639 5641 5699 5702 5704 5708-5709 5715 5718-5719 5723 5725 5889-5891 5896-5898 5900 5905-5907 5910-5913 5915-5916 5970 5972-5973 5985 6007 11119 11131 11174 11181-11182 11186-11187 11216 11256 11447 11453-11454 11490 11789 11878 11881 11884 11914 11924 11968 21859 21862 21869 27235 27245 27534 27582https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/700/A13?format=asciiOpticaldefaultJ/A+A/700/A13/tablea1The members of GD-1 streamrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainRVRadial velocitykm/sphys.veloc;pos.heliocentricdouble[Fe/H]? Metallicityphys.abund.Zfloatnullablephi1The GD-1 coordinate systemdegpos.eq.rafloatphi2The GD-1 coordinate systemdegpos.eq.decfloatpmRAProper motion along right ascensionmas/yrpos.pm;pos.eq.rafloatpmDEProper motion along declinationmas/yrpos.pm;pos.eq.decfloatVgsrThe velocity in the Galactic standard of restkm/sphys.veloc;pos.galacticdoublemodDstModel distancekpcpos.distancefloatVTTangential velocitykm/sphys.veloc.transversefloatMark1[LS] LAMOST or SDSSmeta.codecharMark2[N] N for newlymeta.codecharJ/A+A/700/A13/tablea2The members of Kshir streamrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainRVRadial velocitykm/sphys.veloc;pos.heliocentricdouble[Fe/H]? Metallicityphys.abund.Zfloatnullablephi1The GD-1 coordinate systemdegpos.eq.rafloatphi2The GD-1 coordinate systemdegpos.eq.decfloatpmRAProper motion along right ascensionmas/yrpos.pm;pos.eq.rafloatpmDEProper motion along Declinationmas/yrpos.pm;pos.eq.decfloatVgsrThe velocity in the Galactic standard of restkm/sphys.veloc;pos.galacticdoubleMark1[LS] LAMOST or SDSSmeta.codecharMark2[N] N for newlymeta.codechar