J/ApJ/874/138ivo://CDS.VizieR/J/ApJ/874/138doi:10.26093/cds/vizier.18740138CDSLi J.Liu C.Xue X.Zhong J.Weiss J.Carlin J.L.Tian H.2021-08-11T12:05:26Z2020-09-28T14:22:05ZCDS support team

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

cds-question@unistra.frm-starsgiant-starsvisible-astronomyspectroscopyradial-velocityinfrared-photometrystellar-distancemetallicityproper-motionsWe use LAMOST DR4 M giants combined with Gaia DR2 proper motions and ALLWISE photometry to obtain an extremely pure sample of Sagittarius (Sgr) stream stars. Using TiO5 and CaH spectral indices as indicators, we selected a large sample of M-giant stars from M-dwarf stars in LAMOST DR4 spectra. Considering the position, distance, proper motion, and angular momentum distribution, we obtained 164 pure Sgr stream stars. We find that the trailing arm has higher energy than the leading arm in the same angular momentum. The trailing arm we detected extends to a heliocentric distance of ~130kpc at {Lambda}_{sun}_~170{deg}, which is consistent with the feature found in RR Lyrae in Sesar+ (2017, J/ApJ/844/L4). Both of these detections of Sgr, in M-giants and in RR Lyrae, imply that the Sgr stream may contain multiple stellar populations with a broad metallicity range.2019ApJ...874..138Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/874/138CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)II/328 : AllWISE Data Release (Cutri+ 2013)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/153 : LAMOST DR4 catalogs (Luo+, 2018)J/AJ/113/806 : M-Subdwarfs (Gizis 1997)J/ApJ/508/397 : H-band Spectral Standards (Meyer+ 1998)J/AJ/125/1598 : New high PM stars in the northern sky (Lepine+, 2003)J/ApJ/670/346 : M giant stars in the Sagittarius dwarf galaxy. V. (Chou+, 2007)J/ApJ/753/90 : Stellar param. of K5 and later type Kepler stars (Mann+, 2012)J/AJ/145/102 : Bright M dwarf spectroscopy in the northern sky (Lepine+, 2013)J/MNRAS/440/3430 : SDSS-2MASS-WISE stellar colour locus (Davenport+, 2014)J/other/RAA/15.1154 : M-giant star candidates in LAMOST DR 1 (Zhong+, 2015)J/ApJS/226/1 : Carbon stars from LAMOST DR2 data (Ji+, 2016)J/ApJ/823/59 : WISE and 2MASS photometry of M giant stars (Li+, 2016)J/ApJ/844/L4 : PS1 RRab for tracing outer Virgo overdensity (Sesar+, 2017)J/AJ/153/204 : RR Lyrae stars from the PS1 3{pi} survey (Sesar+, 2017)J/ApJS/234/31 : Carbon stars from LAMOST using machine learning (Li+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/874/138https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/874/138http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/874/138https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/874/138https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/874/138http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/874/138GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/874/138/table1 (The parameters for Sagittarius stream members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/874/138/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/874/138/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/874/138/table1?GETtext/xml+votable180.050000true14.7134612.03063290.0055555555555555566/5 37 42 48 57 61 177 261 320 321 322 331 362 410 439 517 531 790 838 1025 1034 1044 1114 1138 1160 4411 4488 4511 4685 4783 4803 4832 5202 5244 5316 6183 6204 6279 6308 6311 6656 7168 8195 8217 17651 17656 17658 17731 17735 17758 17766 17784 17785 17786 17856 17857 17861 17878 18042 18264 23184 23207 23212 23222 23256 23276 23282 23294 23402 23405 23489 23499 23510 23511 23515 23517 23520 23528 23529 23541 23548 23920 23927 24031 24043 24091 24118 24160 24194 24200 24204 24218 24224 24231 24232 24234 24235 24241 24250 24259 24410 24432 25722 25759 25882 25901 25913 25938 25940 25992 26009 26023 26027 26084 26107 26239 26267 26277 26324 26372 26377 26379 26385 26401 26408 26433 26440 26458 26497 26529 27131 27667 27767 27806 27846 27854 27856 27868 27880 27904 27906 27950 28056 28061 28066 28160 28183 28206 28240 28285 28298 28302 28369 28397 28443 28452 28469 28604 368603.830199579824256e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/874/138?format=asciiOpticalInfrareddefaultJ/ApJ/874/138/table1The parameters for Sagittarius stream membersSimbadNameSimbad column added by the CDSmeta.idcharLambda[63.6/268.4] {Lambda}_{sun}_ value (L_v)degstat.fit.paramfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (ra)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (dec)degpos.eq.dec;meta.mainB[-14.5/14.8] B_{sun}_ value (B_v)degstat.fit.paramdoubleJmag0[10.49/15.08] 2MASS J-band magnitude (j0)magphot.mag;em.IR.JfloatHmag0[9.59/14.22] 2MASS H-band magnitude (h0)magphot.mag;em.IR.HfloatKsmag0[9.22/14.02] 2MASS Ks-band magnitude (k0)magphot.mag;em.IR.KfloatW1mag0[8.86/14] AllWISE W1-band (3.35um) magnitude (w10)magphot.mag;em.IR.3-4umfloatW2mag0[8.9/14.02] AllWISE W2-band (4.6um) magnitude (w20)magphot.mag;em.IR.4-8umfloatHRV[-280/163] Heliocentric radial velocity (rv)km/sspect.dopplerVeloc;pos.heliocentricdoubleVgsr[-263/133] Line-of-sight Galactic standard of rest (GSR) velocity (1)km/sphys.veloc;pos.galacticdoubleDist[20/123.2] Heliocentric distancekpcpos.distancedouble[Fe/H][-5.1/0.8] Metallicity (feh)phys.abund.ZfloatS/N[5/131] Signal to noise ratio (sn)stat.snrfloatXgcX coordinate (positive toward the Sun) (X_GC)kpcpos.cartesian.x;pos.galacticfloatYgcY coordinate (positive in the the direction of Galactic rotation) (Y_GC)kpcpos.cartesian.yfloatZgcZ coordinate (Z_GC)kpcpos.cartesian.z;pos.galacticfloatVx[-359/197] X Cartesian velocity (V_x)km/sphys.veloc;pos.cartesian.xdoubleVy[-223/152] Y Cartesian velocity (V_y)km/sphys.veloc;pos.cartesian.ydoubleVz[-322/137] Z Cartesian velocity (V_z)km/sphys.veloc;src.redshift;pos.projdoublepmRA[-2.3/1.3] Gaia DR2 proper motion in RAmas/yrpos.pm;pos.eq.rafloate_pmRA[0.04/0.7] pmRA uncertainty (pmRA_error)mas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-3/-0.1] Gaia DR2 proper motion in DEC (pmDec)mas/yrpos.pm;pos.eq.decfloate_pmDE[0.03/0.4] pmDE uncertainty (pmDec_error)mas/yrstat.error;pos.pm;pos.eq.decfloatE[-87685/-7501] Energy space (2)km**2.s**-2phys.energy;src.orbitaldoubleL[481.8/20932] Total angular momentum (2)km**2.s**-2phys.angMomentumdoubleLx[-3523/7844] X-component of angular momentum (L_x) (2)km**2.s**-2phys.angMomentumdoubleLy[-2811/17311] Y-component of angular momentum (L_y) (2)km**2.s**-2phys.angMomentumdoubleLz[-9690/9260] Z-component of angular momentum (L_z) (2)km**2.s**-2phys.angMomentumdoubleGaiaDisplay data from Gaia DR2 (I/345) within 1"meta.ref.urlcharWISEADisplay data from AllWISE (II/328) within 3"meta.ref.urlcharLAMOSTDisplay data from LAMOST DR4 (V/153) within 1"meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 3"meta.ref.urlchar