J/ApJ/898/64ivo://CDS.VizieR/J/ApJ/898/64doi:10.26093/cds/vizier.18980064CDSLuo Y.Nemeth P.Li Q.2022-10-04T11:56:06Z2021-12-13T09:52:56ZCDS support team

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

cds-question@unistra.frsubdwarf-starsradial-velocityvisible-astronomyCombining LAMOST radial velocities with Gaia parallaxes and proper motions, we present 3D Galactic space motions and the orbits of 182 single-lined hot subdwarf stars. These stars were identified by Lei+ (Paper I; 2020, J/ApJ/889/117) in Gaia DR2 with LAMOST DR6 and DR7 spectra. He-rich hot subdwarf stars with log(y)>=0 show the largest standard deviations of the Galactic velocity components and orbital parameters, while those with -1<=log(y)<=0 exhibit the second largest standard deviations. The two groups of He-deficient stars with log(y){<}-1 show similar standard deviations, which are systematically lower compared to He-rich stars. We also present a kinematic population classification of the four hot subdwarf helium groups based on their positions in the U-V velocity diagram, the J_Z_- eccentricity diagram, and their Galactic orbits. The overall tendency of the fractional distributions of the four hot subdwarf helium groups in the halo, thin disk, and thick disk is largely consistent with the findings reported by Luo+ (2019ApJ...881....7L) based on LAMOST DR5, which appears to support predictions of binary population synthesis. He-deficient stars with -2.2<=log(y){<}-1 likely originate from a stable Roche lobe overflow channel, He-deficient stars with log(y){<}-2.2 from the common envelope ejection channel, and He-rich stars with log(y)>=0 from the merger channel of double He white dwarf stars. The fraction of He-rich hot subdwarf stars with -1<=log(y)<0 in the thin disk and the halo is far higher than that in the thick disk, which implies that these stars have different formation channels in the thin disk and in the halo.2020ApJ...898...64Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/898/64CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/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/A+A/400/939 : Stellar parameters of 115 HQS sdB stars (Edelmann+, 2003)J/A+A/400/877 : White dwarfs 3D kinematics from SPY project (Pauli+, 2003)J/A+A/430/223 : Parameters of cool companions of sdB stars (Lisker+, 2005)J/A+A/447/173 : 3D-kinematics of WDs from SPY project. II. (Pauli+, 2006)J/MNRAS/380/1098 : UV-upturn of elliptical galaxies model (Han+, 2007)J/A+A/530/A28 : Priority targets for the MUCHFUSS project (Geier+, 2011)J/MNRAS/427/2180 : GALEX survey subdwarf atmospheric parameters (Nemeth+, 2012)J/A+A/551/A31 : New spectral classif. for hot subdwarfs (Drilling+, 2013)J/A+A/569/A15 : KIC 10553698A asteroseismology (Ostensen+, 2014)J/A+A/577/A26 : Radial velocities of hot subluminous stars (Geier+, 2015)J/A+A/576/A44 : Hot subdwarf binaries from MUCHFUSS (Kupfer+, 2015)J/ApJ/818/202 : Hot subdwarf stars in LAMOST DR1 (Luo+, 2016)J/other/RAA/16.G7 : Nearby M subdwarfs from LAMOST DR2 (Bai+, 2016)J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diag. (Gaia Collaboration, 2018)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/ApJ/868/70 : Hot subdwarf stars from Gaia DR2 and LAMOST DR5 (Lei+, 2018)J/A+A/630/A130 : Co-added spectra of HD127493 and HZ44 (Dorsch+, 2019)J/A+A/621/A38 : Gaia catalogue of hot subluminous stars (Geier+, 2019)J/ApJS/240/31 : M-subdwarf research. I. LAMOST DR4 spectra obs. (Zhang+, 2019)J/ApJ/889/117 : Hot subdwarf stars from GaiaDR2 & LAMOST. I. (Lei+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/898/64https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/898/64http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/898/64https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/898/64https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/898/64http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/898/64GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/898/64/table1 (Atmospheric parameters, space positions, orbital parameters and galactic velocities for 182 single-lined hot subdwarf stars observed in Gaia DR2 and LAMOST DR6 and DR7)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/898/64/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/898/64/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/898/64/table1?GETtext/xml+votable180.050000true1.890718313.59932440.0055555555555555566/655 907 930 955 1041 1162 1177 1405 1415 1720 1760 2007 2170 2233 2449 2458 2468 2497 2526 2791-2792 2796 2805-2807 2852 2860 2871-2872 2877 2958 2978 2993 3089 3117 3236 3243 4276 4382 4411 4576 4722 4797 4807 4818 4960 5019 5113 6196 6200 6461 6477 6614 6676 6844 6881 7023 7057 7100 7881 8119 8255 8278 8283 8297 8425 8447 8467 8469 8707 8773 8891 9202 9288 9298 9304 9677 9699 10022 10024 10042 10670 11016 11275 12374 12405 12411 12501 12510 12673 12723 13278 13370 13402 13404 13434-13435 13592 13607 13667 13683 13720 13769 13778 13805 13818 13962 14552 14555 14585 14940 15105 19098 19120 19126 19666 20128 20255 20294 20337 20390 20402 20410 20452 21867 21952 22272 22279 22281 22387 22471 22478 23465 23511 23762 23932 23988 24021 24148 24204 24214 25990 26015 26215 26453 26488 26564 27208 27352 28302 28335 28666 30196-30197 30206 30549 31453 31528 31683 31810 31858 31914 31961 31963 31989 32142 32160-32161 32265 32300 32307-32308 32330 32335 32633 32707 32721 32724https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/898/64?format=asciiOpticaldefaultJ/ApJ/898/64/table1Atmospheric parameters, space positions, orbital parameters and galactic velocities for 182 single-lined hot subdwarf stars observed in Gaia DR2 and LAMOST DR6 and DR7e[0.01/0.99] Eccentricity (3)src.orbital.eccentricityfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decnullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_zmax[0.01/472] Standard error in zmaxkpcstat.errorfloatRA_ICRSBarycentric Right Ascension (ICRS) at Epoch=2000.0degpos.eq.ra;meta.mainDE_ICRS[-3.1/82] Barycentric Declination (ICRS) at Epoch=2000.0degpos.eq.dec;meta.mainTeff[22230/79240] Stellar effective temperature (2)Kphys.temperature.effectiveinte_Teff[10/11150] Standard error in TeffKstat.error;phys.temperature.effectiveintlogg[5/6.9] Stellar surface gravity (2)log(cm.s**-2)phys.gravityfloate_logg[0/0.8] Standard error in logglog(cm.s**-2)stat.errorfloatlog(y)[-3.5/2.81] Stellar surface He abundance y=n(He)/n(H) (2)log(Sun)pos.cartesian.yfloate_log(y)[0.01/1.04]? Standard error in log(y), null for upper limitslog(Sun)stat.errorfloatnullablepmRA[-32.3/24.12] Proper motion in RAmas/yrpos.pm;pos.eq.rafloate_pmRA[0.04/0.7] Standard error pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-32.84/17] Proper motion in DEmas/yrpos.pm;pos.eq.decfloate_pmDE[0.04/0.5] Standard error in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatdist[279/8850] Gaia DR2 stellar distancepcpos.distance;pos.heliocentricintSpTSpectral type (2)src.spTypechare_dist[6/8427] Standard error in distpcstat.errorintRVel[-352/206] Radial velocity from LAMOST spectrakm/sphys.veloc;pos.heliocentricinte_RVel[12/78] Standard error in RVelal velocitykm/sstat.error;spect.dopplerVelocintX[-13.4/-4.3] Galactic position towards Galactic centerkpcpos.distance;pos.galacticfloate_X[0.002/2.9] Standard error in Xkpcstat.error;pos.cartesian.xfloatY[-3.6/7.1] Galactic position along Galactic rotationkpcpos.distance;pos.cartesian.y;pos.galacticfloate_Y[0.001/4.1] Standard error of Ykpcstat.error;pos.cartesian.yfloatZ[-3.2/6.3] Galactic position towards north Galactic polekpcpos.distance;pos.galacticfloate_Z[0.001/3.1] Standard error of Zkpcstat.error;src.redshiftfloatU[-317/257] Galactic radial velocity positive towards Galactic centerkm/sspect.dopplerVeloc;pos.galacticinte_U[1/198] Standard error in Ukm/sstat.error;pos.cartesian.xintV[-301/328] Galactic rotational velocity along Galactic rotationkm/sphys.veloc.rotat;pos.galacticinte_V[0/275] Standard error in Vkm/sstat.error;pos.cartesian.yintW[-336/162] Galactic velocity towards north Galactic polekm/sphys.veloc;pos.galacticinte_W[0/215] Standard error in Wkm/sstat.error;pos.cartesian.zintRap[5.9/446.2] Apocenter radius (3)kpcphys.size.radiusfloate_Rap[0.02/499] Standard error in Rapkpcstat.errorfloatRperi[0.06/14.3] Pericenter radius (3)kpcphys.size.radiusfloate_Rperi[0.01/8.5] Standard error in Rperikpcstat.errorfloatzmax[0.09/372] Maximum vertical height (3)kpcpos.cartesian.z;stat.maxfloate_e[0.01/0.22] Standard error in estat.errorfloatJz[-3515/2972] Z-component of angular momentum (3)kpc.km**-1.s**-1phys.angMomentumdoublee_Jz[8.3/2962] Standard error in Jzkpc.km**-1.s**-1stat.errorfloatzn[0.01/8.5] Normalised z-extent of the orbit (3)src.orbitalfloate_zn[0/38.5] Standard error in znstat.errorfloatPopPopulation classification (4)meta.codecharp(TH)[0/95] Probability in thin disk%statintp(TK)[0/99] Probability in thick disk%statintp(H)[0/100] Probability in halo%statintGaiaGaia DR2 identifier from Paper I (Lei+ 2020, J/ApJ/889/117); column added by CDSmeta.idPapIDisplay data from Paper I (Lei+ 2020, J/ApJ/889/117)meta.ref.urlcharLAMOSTLAMOST DR6+7 targetmeta.id;meta.maincharl_log(y)Upper limit flag on log(y)meta.code.errorchar