J/ApJ/910/46ivo://CDS.VizieR/J/ApJ/910/46doi:10.26093/cds/vizier.19100046CDSLi J.Xue X.-X.Liu C.Zhang B.Rix H.-W.Carlin J.L.Yang C.,Mendez R.A.Zhong J.Tian H.Zhang L.Xu Y.Wu Y.Zhao G.Chang R.2022-09-30T23:19:25Z2022-09-19T09:18:09ZCDS support team

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

cds-question@unistra.frmilky-way-galaxygiant-starsk-starsproper-motionsradial-velocitychemical-abundancessurveysvisible-astronomyWe characterize the kinematic and chemical properties of 589 Galactic anticenter substructure stars (GASS) with K/M giants in integrals-of-motion space. These stars likely include members of previously identified substructures such as Monoceros, A13, and the Triangulum-Andromeda cloud. We show that these stars are in nearly circular orbits on both sides of the Galactic plane. We can see a velocity (VZ) gradient along Y-axis especially for the south GASS members. Our GASS members have similar energy and angular momentum distributions to thin-disk stars. Their location in [{alpha}/M] versus [M/H] space is more metal-poor than typical thin-disk stars, with [{alpha}/M] lower than that of the thick disk. We infer that our GASS members are part of the outer metal-poor disk stars and that the outer disk extends to 30 kpc. Considering the distance range and {alpha}-abundance features, GASS could be formed after the thick disk was formed due to the molecular cloud density decreasing in the outer disk where the star-formation rate might be less efficient compared to the inner disk.2021ApJ...910...46Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/910/46CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/46 : Ap and Am Stars (Bertaud+ 1974; Bidelman+ 1973)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/AJ/100/1191 : Giants DDO photometry (Morrison+, 1990)J/ApJS/96/175 : Kinematics of Metal-Poor Stars. I. (Beers+ 1995)J/AJ/115/168 : Kinematics of red giant and RR Lyrae stars (Chiba+ 1998)J/AJ/119/2866 : Proper motions of metal-poor stars (Beers+, 2000)J/ApJ/588/824 : Velocities of blue stars near (l,b)=(198,-27) (Yanny+, 2003)J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)J/A+A/493/71 : UBV photometry of Shorlin 1 (Carraro+, 2009)J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)J/A+A/562/A71 : Abundances of solar neighbourhood dwarfs (Bensby+, 2014)J/ApJ/784/170 : The SEGUE K giant survey. II. Distances (Xue+, 2014)J/ApJ/788/180 : Very metal-poor stars in the Milky Way's halo (Carollo+, 2014)J/ApJ/794/58 : Metal-poor stars in the thick disk of the Galaxy (Beers+, 2014)J/ApJ/823/59 : WISE and 2MASS photometry of M giant stars (Li+, 2016)J/ApJS/226/1 : Carbon stars from LAMOST DR2 data (Ji+, 2016)J/ApJ/854/47 : RRab stars of Monoceros & A13 overdensities (Sheffield+, 2018)J/ApJS/234/31 : Carbon stars from LAMOST using machine learning (Li+, 2018)J/ApJ/859/L8 : Properties of TriAnd stars (Hayes+, 2018)J/ApJ/880/65 : LAMOST K giants in Galactic halo substructures (Yang+, 2019)J/ApJS/244/8 : M-type stars in LAMOST DR5 (Zhong+, 2019)J/ApJ/886/154 : Sgr stream K- & M-giants and BHB stars (Yang+, 2019)J/ApJS/246/9 : Stellar parameters of LAMOST stars using SLAM (Zhang+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/910/46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/910/46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/910/46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/910/46https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/910/46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/910/46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/910/46/gass (Parameters of the Galactic anticenter substructure stars (GASS; table 1) and orbital parameters (Table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/910/46/gass?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/910/46/gass?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/910/46/gass?GETtext/xml+votable180.050000true44.0177060.9625120.0055555555555555565/229 610 6/2 73 98 243 252 273 279 281 303 310 316 319 323 330 351-353 356 358 369 376 382 385 388 397 403 405 412-413 415 433 435 437 442-443 451-452 456 461-462 469 472 478 481 483 485 487 491 493-495 505 607 626 692 730 774 782 789 792 796 800 816-817 819-821 823-825 829-830 833 836 839 841-842 853-854 857 871 873-874 880-881 890 909-910 912 914 923 925 927 929 941 949 951 957 960 962 967 973 978 981 983-984 986 989 992-993 997 1004 1012 1031 1041 1043-1044 1057 1083 1118 1145-1146 1181 1190 1193 1199 1202 1206 1210 1224 1228 1259-1260 1262 1365 1536 1542 1545 1557 1570 1583 1598 1730 1738 1863 1899 1989 2019 2093 2111 2136 2138 2145-2146 2153 2155 2158-2160 2192 2199 2206 2210 2212 2224 2230 2238 2241-2242 2247-2248 2251-2253 2259 2263 2268-2269 2271 2273 2276 2285-2289 2298 2314-2315 2346 2349 2359 2368 2374 2380 2392 2402 2410 2432-2433 2438 2445 2451 2453 2456-2458 2464 2479 2485 2492 2505 2526 2529 2531 2538 2564 2571 2573 2575 2577 2579 2584-2586 2593 2595 2597-2598 2602 2617 2621 2627 2629 2634 2636 2647 2650 2663 2666 2672 2680 2689 2692 2721 2749 2752 2758 2793 2823 2833 2841 3117 4129 4141 4147 4154 4177 4205 4277 4286 4314 4328 4330 4332-4333 4500 4529 4541 4617 4619 4623 4661 4663 4707 4713 4717 4747 4754 4756 4765 4773-4774 4781 4795 4808 4816 4839 4872 4889-4890 4996 4998 5034 5048 5066 5070 5073 5094 6147 6152 6173 6177 6197 6201 6218 6226 6229 6234 6265 6278 6283 6326 6335 6338-6339 6346 6352 6363 6382 6391 6396 6404 6414 6416 6425-6426 6435 6473 6533 6550 6558 6576 6608-6609 6614-6615 6632 6640 6643 6646-6647 6681 6695 6704 6757 6760 6776-6777 6783 6853 6881 6887-6888 6913 6918 6922 6929 6931 6936 6940-6941 6951 6953 6972-6973 6980 6997 7030-7031 7056 7064 7070 7072 7084 7092-7093 7113 7118-7119 7122 7125 7194 7243 7292 7336 7680-7681 7692 7712 7715 7720 13401 13418 13423 13480 13510 13618 13641 13684 13803 13839 13969 14731 20170 20313 20336 20350 20371 20374 20408 20410 20412 20433 20453 20464 20467 20470 20479 21478 21483 21497 21765 21816 21843 21911 21916 21951 21963 21966 21968 21972 21975-21976 21982-21983 21996 22336 22341-22342 22384 22391 22456 22472-22473 22494 22526 22790 22797 22807 22839 22869 22873 22877 22957 22972 23007 23031 23131-23132 23152 23156 23167 23228 23281 23306 23333 23338 23341 23347 23353 23356 23402 23413 23415 23421 23497 23505 23523 23535 23542 23545 23551 23588 23682 23700 23710 23715 23828 23875 23889 23892 23894 23900 23915-23916 23929 23931 23959 24001 24049 24058 24060 24070 24091 24096 24108 24134 24163 24173 24195 24212 24230 24238 24249 24265 24564 27169 27270 31071 36861https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/910/46?format=asciiOpticaldefaultJ/ApJ/910/46/gassParameters of the Galactic anticenter substructure stars (GASS; table 1) and orbital parameters (Table 2)e_HRV[0/56] Uncertainty in HRVkm/sstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOST[216068/584303141] LAMOST unique identifiermeta.id;meta.mainlongGaiaGaia DR2 solution identifiermeta.id.crossTypeSource type (1)src.classcharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainDist[6/32.5] Distance (2)kpcpos.distance;pos.heliocentricfloate_Dist[0.3/8] Uncertainty in Distkpcstat.errorfloatHRV[-199.1/152.4] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricdoublepmRA[-2.5/0.9] Gaia DR2 proper motion along RAmas/yrpos.pm;pos.eq.rafloate_pmRA[0.02/0.8] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-4.1/0.6] Gaia DR2 proper motion along DEmas/yrpos.pm;pos.eq.decfloate[11.6/43] Eccentricitysrc.orbital.eccentricityfloate_pmDE[0.02/0.6] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloat[M/H][-5.3/1.7] Metallicity (3)log(Sun)phys.abund.Zfloate_[M/H][0.029/0.5] Uncertainty in [M/H]log(Sun)stat.error;phys.abundfloat[a/M][-0.32/3.2] Log {alpha}-elements to metals abundance ratio (3)log(Sun)phys.abunddoublee_[a/M][0.019/0.2] Uncertainty in [a/M]log(Sun)stat.errorfloate_e[0.2/409] Uncertainty in estat.errordoublea[0.058/0.55] Semi-major axiskpcphys.angSize.smajAxis;src.orbitalfloate_a[0.0039/0.2] Uncertainty in akpcstat.errorfloatlOrbGalactic longitude of orbital poledegsrc.orbitaldoublee_lOrb[0.5/175] Uncertainty in lOrbdegstat.errordoublebOrb[144/175] Galactic latitude of orbital poledegsrc.orbitaldoublee_bOrb[0.17/14] Uncertainty in bOrbdegstat.errorfloatlApoGalactic longitude of apocenter (1)degsrc.orbitalfloate_lApo[4.1/174] Uncertainty in lApodegstat.errorfloatE[-96052/-53139] Energykm**2.s**-2phys.energy;src.orbitaldoublee_E[620/16806] Uncertainty in Ekm**2.s**-2stat.errordoubleL[2362/7054] Angular momentumkm.s**-1.kpc**-1phys.angMomentumfloate_L[38/2275] Uncertainty in Lkm.s**-1.kpc**-1stat.errorfloatZ20Display data from Zhang+, 2020, J/ApJS/246/9meta.ref.urlintnullable