LAMOST K giants in Galactic halo substructures J/ApJ/880/65 ivo://CDS.VizieR/J/ApJ/880/65 doi:10.26093/cds/vizier.18800065 CDS Yang C. Xue X.-X. Li J. Zhang L. Liu C. Zhao G. Chang J. Tian H.,Li C. 2021-09-10T09:32:20Z 2021-01-28T12:41:24Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr giant-stars halo-stars k-stars stellar-distance radial-velocity proper-motions stellar-associations visible-astronomy We construct a large halo K-giant sample by combining the positions, distances, radial velocities, and metallicities of over 13000 LAMOST DR5 halo K giants with the Gaia DR2 proper motions, which covers a Galactocentric distance range of 5-120kpc. Using a position-velocity clustering estimator (the 6Distance), we statistically quantify the presence of position-velocity substructure at high significance: K giants have more close pairs in position-velocity space than a smooth stellar halo. We find that the amount of substructure in the halo increases with increasing distance and metallicity. With a percolation algorithm named friends-of-friends to identify groups, we identify members belonging to Sagittarius (Sgr) Streams, Monoceros Ring, Virgo Overdensity, Hercules-Aquila Cloud, Orphan Streams, and other unknown substructures and find that the Sgr streams account for a large part of grouped stars beyond 20kpc and enhance the increase of substructure with distance and metallicity. For the first time, we identify spectroscopic members of Monoceros Ring in the southern and northern Galactic hemispheres, which presents a rotation of about 185km/s and a mean metallicity of -0.66dex. 2019ApJ...880...65Y https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/880/65 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018) I/345 : Gaia DR2 (Gaia Collaboration, 2018) V/164 : LAMOST DR5 catalogs (Luo+, 2019) J/ApJ/588/824 : Veloc. of blue stars near (l,b)=(198,-27) (Yanny+, 2003) J/A+A/493/71 : UBV photometry of Shorlin 1 (Carraro+, 2009) J/MNRAS/398/1757 : RR Lyraes in SDSS stripe 82 (Watkins+, 2009) J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009) J/ApJ/714/663 : Stellar density map of the Milky Way (de Jong+, 2010) J/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010) J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011) J/ApJ/738/79 : SDSS-DR8 BHB stars in the Milky Way's halo (Xue+, 2011) J/MNRAS/422/2116 : BHB & RR Lyrae towards Anticentre and NGP (Kinman+, 2012) J/ApJ/776/26 : RRab stars in the Orphan stream distances (Sesar+, 2013) J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014) J/A+A/566/A118 : Comprehensive view of Virgo stellar stream (Duffau+, 2014) J/ApJ/784/170 : SEGUE K giant survey. II. Distances (Xue+, 2014) J/ApJ/816/80 : SEGUE K giant survey. III. Galactic halo (Janesh+, 2016) J/ApJ/844/L4 : RRab for tracing outer Virgo overdensity (Sesar+, 2017) J/ApJ/836/5 : Abundances of LAMOST giants from APOGEE DR12 (Ho+, 2017) J/ApJS/245/34 : LAMOST DR5 abundances for 6 million stars (Xiang+, 2019) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/880/65 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/880/65 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/880/65 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/880/65 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/880/65 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/880/65 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/880/65/groups (Known (Table 3) and unknown (Table 4) substructures) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/880/65/groups? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/880/65/groups? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/880/65/groups? GET text/xml+votable 180.0 50000 true 11.01 -4.33 0.005555555555555556 Cone search capability for table J/ApJ/880/65/table5 (Group member catalog in groups with five or more members) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/880/65/table5? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/880/65/table5? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/880/65/table5? GET text/xml+votable 180.0 50000 true 15.59709194 5.31073611 0.005555555555555556 5/1 8 32 49 229 1200 1237 1286 4412 4444 4446 4447 4464 4465 4468 4471 5816 6755 6911 6913 7008 7023 7089 6/1 2 3 10 13 14 15 16 17 19 21 22 23 24 27 28 30 31 36 37 39 42 43 45 46 48 50 51 52 53 54 56 57 59 60 63 72 73 75 76 79 82 88 90 97 99 100 102 106 111 112 133 137 138 142 143 144 146 147 149 150 151 158 160 161 170 173 178 180 181 183 185 187 189 195 205 206 210 214 218 219 221 222 223 232 233 235 244 246 249 260 279 281 282 287 295 305 310 311 315 316 318 319 321 328 340 352 353 356 358 360 376 385 388 390 397 399 402 403 405 406 407 408 410 412 413 415 417 432 433 434 436 439 442 443 449 450 451 452 456 460 461 462 464 472 481 483 485 487 491 493 494 495 505 513 517 531 576 601 607 672 691 730 769 774 782 794 796 800 816 820 821 823 824 825 829 830 833 842 873 874 909 910 912 923 925 927 929 949 957 960 962 967 973 978 983 993 1161 2055 2068 2072 2074 2093 2108 2111 2122 2123 2136 2138 2145 2146 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Should Not be used for identification. meta.record int Group [0/41] Group identifier meta.id int primary Ns Number of LAMOST halo K giants in this group (link to Table 5) meta.number int nullable RAJ2000 [-8/336] Right ascension, minimum (J2000) deg pos.eq.ra;meta.main RAMdeg [5/353] Right ascension, maximum (J2000) deg pos.eq.ra;stat.max DEJ2000 [-6/35] Declination, minimum (J2000) deg pos.eq.dec;meta.main DEMdeg [8/61] Declination, maximum (J2000) deg pos.eq.dec;stat.max Distm [6/78] Distance, minimum kpc pos.distance;stat.min float DistM [17/96] Distance, maximum kpc pos.distance;stat.max float HRVm [-330/118] Heliocentric radial velocity, minimum km/s spect.dopplerVeloc;pos.heliocentric;stat.min float HRVM [-203/289] Heliocentric radial velocity, maximum km/s spect.dopplerVeloc;pos.heliocentric;stat.max float pmRA [-7/1.4] Proper motion in right ascension, minimum mas/yr pos.pm;pos.eq.ra float pmRAM [-1/4.2] Proper motion in right ascension, maximum mas/yr pos.pm;pos.eq.ra;stat.max float pmDE [-7.5/-0.1] Proper motion in declination, minimum mas/yr pos.pm;pos.eq.dec float pmDEM [-2.1/0.9] Proper motion in declination, max mas/yr pos.pm;pos.eq.dec;stat.max float [Fe/H]m [-2.5/-1.5] Log of Fe/H abundance, minimum phys.abund.Fe;stat.min float [Fe/H]M [-1.8/-0.1] Log of Fe/H abundance, maximum phys.abund.Fe;stat.max float Name Name of the known substructure meta.id;meta.main char SimbadName Simbad column added by the CDS meta.id char
J/ApJ/880/65/table5 Group member catalog in groups with five or more members RAJ2000 Right Ascension (J2000) deg pos.eq.ra;meta.main recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int obsID [203248/584701188] LAMOST observation identifier (1) meta.id;obs.param;obs long DEJ2000 [-5.7/60.2] Declination (J2000) deg pos.eq.dec;meta.main Dist [6.15/96] Distance kpc pos.distance;pos.heliocentric float HRV [-329.5/288.3] Heliocentic radial velocity km/s spect.dopplerVeloc float pmRA [-6.6/4.2] Gaia DR2 proper motion in Right Ascension mas/yr pos.pm;pos.eq.ra float pmDE [-7.5/0.9] Gaia DR2 proper motion in Declination mas/yr pos.pm;pos.eq.dec float Group [0/24]? Group identifier, as in Table 4 (2) meta.id;meta.table int nullable H17 Display data from Ho+, 2017, J/ApJ/836/5, within 1" meta.ref.url int nullable Gaia Display the Gaia DR2 (I/345); Bailer-Jones+, 2018, I/347 and Gaia EDR3 (I/350) within 1" meta.ref.url char