J/MNRAS/487/1462ivo://CDS.VizieR/J/MNRAS/487/1462doi:10.26093/cds/vizier.74871462CDSFernandez-Alvar E.Fernandez-Trincado J.G.Moreno E.Schuster W.J.,Carigi L.Recio-Blanco A.Beers T.C.Chiappini C.Anders F.,Santiago B.X.Queiroz A.B.A.Perez-Villegas A.Zamora O.,Garcia-Hernandez D.A.Ortigoza-Urdaneta M.2024-08-19T20:18:47Z2023-01-10T13:27:10ZCDS support team

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

cds-question@unistra.frhalo-starschemical-abundancesmilky-way-galaxyradial-velocityproper-motionsvisible-astronomytrigonometric-parallaxWe report an analysis of the metal-rich tail ([Fe/H]>-0.75) of stars located at distances from the Galactic plane up to |z|~10kpc, observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE). We examine the chemistry, kinematics, and dynamics of this metal-rich sample using chemical abundances and radial velocities provided by the 14th APOGEE data release (DR14) and proper motions from the second Gaia data release (DR2). The analysis reveals three chemically different stellar populations in the [Mg/Fe] versus [Fe/H] space - a high-[Mg/Fe] and low-[Mg/Fe] populations, and a third group with intermediate [Mg/Fe]~+0.1 - as well as for other chemical elements. We find that they are also kinematically and dynamically distinct. The high-[Mg/Fe] population exhibits a prograde rotation which decreases down to 0 as |z_max_| increases, as well as eccentric orbits that are more bound and closer to the plane. The low-[Mg/Fe] stars are likely Sagittarius members, moving in less-bound orbits reaching larger distances from the centre and the Galactic plane. The intermediate-[Mg/Fe] stars resembles the two stellar overdensities lying about |z|~5kpc recently reported in the literature, for which a disc origin has been claimed. We report the identification of new members of these two disc-heated overdensities.2019MNRAS.487.1462Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/487/1462CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/487/1462https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/487/1462http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/487/1462https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/487/1462https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/487/1462http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/487/1462GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/487/1462/tablea1 (Stellar parameters, [Fe/H] and [Mg/Fe] abundances for our 504 halo candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/1462/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/1462/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/1462/tablea1?GETtext/xml+votable180.050000true204.54438.3880.0055555555555555565/6977 6/79 90 147 165 4073 4277-4278 4299 4320 4590 4783 4827 4880 4932 4934-4935 4940-4941 4944 4946 5145 5147-5148 5150 5181 5226 5327 5331 5338 5349 5351 5360 5373 5494 5529 5531-5532 5538 5553-5554 5562 5567 5581 5601 5609 5662 5681 5686 5689 5717 5739 5741 5743 5753 5801-5802 5810 5831 5840 5867 5916-5917 5919 5923 5964 5974 6364 6403-6404 6406 6458 6556 6574 6631 6654 6993 7168 7274 7318 7787 8335 8381 8443 8446 8565-8567 8575 8784-8785 8788 8865-8867 8940 8942 8961-8964 8966 8969 8973 8987 8990-8991 9012-9013 9070 9116-9117 9153-9154 9157 9160 9172 9175 9180 9182 9201 9203 9213 9250 9253 9256 9273-9274 9335 9357-9358 9375 9416 9431 9438 9440 9465-9466 9471 9478 9495 9510 9516 9599 9601-9602 9623 9629 9641-9642 9665-9667 9672 9692 9707-9708 9813 9819-9820 9837 9840 9846 9886 9897 9899 9908 9923 9931 9933 9935 9954 9973 9975 9993 9999 10008 10024 10086-10087 10089 10112 10120-10121 10144 10189 10205 10211-10212 10256 10289 10291 10306 10322-10324 10326 10336-10337 10382 10400 10485 10487 10493 10530 10581 10583 10654 10661 10674 10700 10706 10712 10851 10861 10872 10895 10932 10936 10947 10950 10976-10977 11047 11102 11124 11186-11187 11189 11191 11203 11210 11269 11274 11278 11298-11299 11302 11312 11396 11407 11409 11424-11425 11432-11434 11443 11446-11447 11594 11692 11986 11992 12395 12405 17797 18094 19099 19223 19627 19630 19704 19980-19981 20382 23059 23224 23481 25350 25386-25387 25403 25489-25490 25589 25595 25607 25618 25854 25874 25878 25880-25881 26014 26020 26022 26028 26037 26058 26074-26075 26098 26115 26118 26120-26121 26124 26166 26173 26182 26192-26193 26253 26272 26277 26281 26595 26598 26600 26604 26653 26720-26721 26839 26913 26915 26963-26964 26973-26975 26987 26996 27008 27093 27127 27132 27253 27623 27632 27634 27643 27658 27668 27676-27677 27714 27862-27863 27900 27916 27946 27969 27974-27975 27984 27986 28032 28034 28072-28073 28125 28127 28139 28151 28203 28245-28247 28253 28282 28291 28297 28299 28334 28343-28344 28416 28418 28481 28483 28630 28644 30774 31393 31395-31396 31398 31416-31417 31601 31604 31625 32463 36525-36526 36780 40748 40820 40822-40823 44959 44981 44986 45000 45002-45003 45024-45025https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/487/1462?format=asciiOpticaldefaultJ/MNRAS/487/1462/tablea1Stellar parameters, [Fe/H] and [Mg/Fe] abundances for our 504 halo candidatesSimbadNameSimbad column added by the CDSmeta.idcharnullableGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatTeffEffective temperatureKphys.temperature.effectivefloate_TeffError on TeffKstat.error;phys.temperature.effectivefloatloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggError on logglog(cm.s**-2)stat.errorfloat[Fe/H]Iron to hydrogen abundance ratiophys.abund.Fe;arith.ratiofloate_[Fe/H]Error on [Fe/H]stat.error;phys.abund.Fefloat[Mg/Fe]Mg to iron abundance ratiophys.abund.Fe;arith.ratiofloate_[Mg/Fe]Error on [Mg/Fe]stat.error;phys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name from APOGEE (2MHHMMSSss+DDMMSSs)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJ/MNRAS/487/1462/tablea2Radial velocities, parallaxes, proper motions, and distances for our 504 halo candidatesDistDistance (2)pcpos.distancefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name from APOGEE (2MHHMMSSss+DDMMSSs)meta.id;meta.maincharRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVError on RVkm/sstat.errorfloatplxParallax (1)maspos.parallax.trigfloate_plxError on parallax (1)masstat.error;pos.parallaxfloatpmRAProper motion in right ascension (1)mas/yrpos.pm;pos.eq.rafloate_pmRAError on pmRA (1)mas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declination (1)mas/yrpos.pm;pos.eq.decfloate_pmDEError on pmDE (1)mas/yrstat.error;pos.pm;pos.eq.decfloate_DistError on Dist (2)pcstat.errorfloat