Hot subdwarf stars with Gaia DR2 and LAMOST DR7 data J/ApJS/256/28 ivo://CDS.VizieR/J/ApJS/256/28 doi:10.26093/cds/vizier.22560028 CDS Luo Y. Nemeth P. Wang K. Wang X. Han Z. 2023-06-08T08:17:05Z 2022-02-28T15:40:20Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr subdwarf-stars chemical-abundances proper-motions radial-velocity stellar-radii halo-stars visible-astronomy Based on the Gaia DR2 catalog of hot subdwarf star candidates, we identified 1587 hot subdwarf stars with spectra in LAMOST DR7. We present atmospheric parameters for these stars by fitting the LAMOST spectra with TLUSTY/SYNSPEC non-LTE synthetic spectra. Combining LAMOST radial velocities and Gaia Early Data Release 3 (EDR3) parallaxes and proper motions, we also present the Galactic space positions, velocity vectors, orbital parameters and the Galactic population memberships of the stars. With our He classification scheme, we identify four groups of He rich hot subdwarf stars in the T_eff_-logg and T_eff_-log(nHe/nH) diagrams. We find two extreme He-rich groups (eHe-1 and eHe-2) for stars with log(nHe/nH)>=0 and two intermediate He-rich groups (iHe-1 and iHe-2) for stars with -1<=log(nHe/nH)<0. We also find that over half of the stars in Group eHe-1 are thick-disk stars, while over half of the stars in Group eHe-2 correspond to thin-disk stars. The disk population fractions of Group iHe-1 are between those of Group eHe-1 and eHe-2. Almost all of the stars in Group iHe-2 belong to the thin disk. These differences indicate that the four groups probably have very different origins. Comparisons between hot subdwarf stars in the halo and in the Galactic globular cluster {omega} Cen show that only He-deficient stars with -2.2<=log(nHe/nH){<}-1 have similar fractions. Hot subdwarfs with log(nHe/nH)>=0 in {omega} Cen have no counterparts in the thick-disk and halo populations, but they appear in the thin disk. 2021ApJS..256...28L https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/256/28 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to VI/65 : Evolutionary models of evolved stars (Dorman+ 1993) I/345 : Gaia DR2 (Gaia Collaboration, 2018) I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018) V/164 : LAMOST DR5 catalogs (Luo+, 2019) I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021) J/ApJ/419/596 : Pop I UV radiation models (Dorman+, 1993) J/A+A/400/877 : White dwarfs 3D kinematics from SPY project (Pauli+, 2003) J/A+A/400/939 : Stellar parameters of 115 HQS sdB stars (Edelmann+, 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/MNRAS/427/2180 : GALEX survey subdwarf atmospheric parameters (Nemeth+, 2012) J/A+A/551/A31 : Spectral classification for hot subdwarfs (Drilling+, 2013) J/A+A/569/A15 : KIC 10553698A asteroseismology (Ostensen+, 2014) J/A+A/576/A44 : Hot subdwarf binaries from MUCHFUSS (Kupfer+, 2015) J/A+A/577/A26 : Radial velocities of hot subluminous stars (Geier+, 2015) J/ApJ/818/202 : Hot subdwarf stars in LAMOST DR1 (Luo+, 2016) J/AJ/156/18 : Binary companions of evolved stars (Price-Whelan+, 2018) J/A+A/618/A15 : Parameters of EHB stars in {omega} Cen (Latour+, 2018) J/ApJ/868/70 : Hot subdwarf stars from Gaia DR2 and LAMOST DR5 (Lei+, 2018) J/A+A/621/A38 : Gaia catalogue of hot subluminous stars (Geier+, 2019) J/ApJ/881/135 : Hot subdwarf stars from Gaia DR2 & LAMOST DR5 II. (Lei+, 2019) J/A+A/630/A130 : Co-added spectra of HD127493 and HZ44 (Dorsch+, 2019) J/ApJ/889/117 : Hot subdwarf stars from Gaia & LAMOST DR6+7. I. (Lei+, 2020) J/A+A/635/A193 : Catalogue of hot subdwarf stars DR2 (Geier, 2020) J/ApJ/898/64 : Hot subdwarf stars from Gaia with LAMOST sp. II. (Luo+, 2020) J/A+A/642/A180 : Hot subdwarf stars binarity (Pelisoli+, 2020) J/A+A/643/A22 : UVES spectra of Feige 46 and LSIV -14 116 (Dorsch+, 2020) http://dr7.lamost.org/ : LAMOST DR7 home page https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/256/28 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/256/28 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/256/28 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/256/28 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/256/28 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/256/28 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJS/256/28/table1 (Atmospheric parameters, space positions, orbital parameters and galactic velocities for 1587 hot subdwarf stars identified in Gaia DR2 with spectra of LAMOST DR7) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/256/28/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/256/28/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/256/28/table1? GET text/xml+votable 180.0 50000 true 0.06568194 17.64804694 0.005555555555555556 Cone search capability for table J/ApJS/256/28/table2 (The excluded targets from the Gaia DR2 catalogue of hot subdwarf star candidates with spectra from LAMOST DR7) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/256/28/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/256/28/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/256/28/table2? GET text/xml+votable 180.0 50000 true 0.547305 36.50562611 0.005555555555555556 5/2167 2536 3180 3644 5559 5953 5958 6002 6/43 64 78 85 97 132 142 148 168 181 220 222 226-227 255 319 331 398-399 407 414 448 457 485 493 495-496 544 550 608 655 676 689 709 718 723 728 730 765 767 781 823 829 855 865 872 888 894 907 924 930 944 955 958 1004-1005 1009 1011 1041 1069 1109 1154 1157-1158 1162 1177 1185 1202 1213 1251-1252 1260 1279 1291 1304 1310 1335 1348 1351 1356 1362 1374 1389 1397 1405 1415 1429 1433 1468 1470 1542 1555 1559 1563-1564 1570-1572 1595 1602 1666 1668 1672 1678 1683-1686 1688 1695 1712 1720 1724 1760 1772 1792 1809 1913 1950 2007 2041 2056 2061 2073 2094 2100 2106 2114 2130-2132 2143-2144 2151 2154 2157 2162 2170 2178 2198 2221 2224 2228 2231 2233-2234 2239-2240 2243 2246 2254 2262 2269 2271 2288 2292 2316 2346 2349 2358 2362-2363 2366 2370 2374 2392 2410-2411 2417 2420 2424 2441 2449-2450 2458 2468 2485 2489 2492-2493 2496-2498 2505-2507 2509 2526 2540 2561 2584 2588 2591 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45045-45046 1.9867573869263685e-19 3.916500758235022e-19 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/256/28?format=ascii Optical default J/ApJS/256/28/table1 Atmospheric parameters, space positions, orbital parameters and galactic velocities for 1587 hot subdwarf stars identified in Gaia DR2 with spectra of LAMOST DR7 SimbadName Simbad column added by the CDS meta.id char nullable New New hot subdwarf star (Y=Yes, 224 occurrences; N=No) meta.code char G19 Display data from Geier+, 2019, J/A+A/621/A38 within 1" meta.ref.url int nullable DR4+5 Display data from LAMOST -DR4 (V/153) and -DR5 (V/164) within 0.5" meta.ref.url int nullable Gaia Display data from Gaia EDR3 within 3" meta.ref.url char _RA.icrs Right ascension (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.ra indexed _DE.icrs Declination (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.dec indexed LAMOST LAMOST target (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char Pop Population classification (3) meta.code.class char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int e_W [0/197] Standard error in W km/s stat.error;pos.cartesian.z int RA_ICRS Barycentric Right Ascension (ICRS) at epoch 2000.0 deg pos.eq.ra;meta.main DE_ICRS Barycentric Declination (ICRS) at epoch 2000.0 deg pos.eq.dec;meta.main Teff [18313/80000] Stellar effective temperature K phys.temperature.effective int e_Teff [0/7763] Standard error in Teff K stat.error;phys.temperature.effective int logg [4.5/6.6] Stellar surface gravity log(cm.s**-2) phys.gravity float e_logg [0/0.7] Standard error in logg log(cm.s**-2) stat.error float log(y) [-4.3/2.5] Stellar surface He abundance y=n(He)/n (H) log(Sun) phys.abund.Y float e_log(y) [0/5.7] Standard error in log(y) log(Sun) stat.error float pmRA [-95.6/82.1] Gaia EDR3 proper motion in RA mas/yr pos.pm;pos.eq.ra float e_pmRA [0.01/0.9] Standard error in pmRA mas/yr stat.error;pos.pm;pos.eq.ra float pmDE [-97.5/65.3] Gaia EDR3 proper motion in DE mas/yr pos.pm;pos.eq.dec float e_pmDE [0.01/0.6] Standard error in pmDE mas/yr stat.error;pos.pm;pos.eq.dec float dist [116/16835] Gaia EDR3 stellar distance pc pos.distance;pos.heliocentric int e_dist [0/13806] Standard error in dist pc stat.error int RVel [-391/406] Radial velocity from LAMOST DR7 spectra km/s phys.veloc;pos.heliocentric int e_RVel [5/147] Standard error in RVel km/s stat.error;spect.dopplerVeloc int X [-18.4/4.5] Galactic position towards Galactic center kpc pos.distance;pos.galactic float e_X [0/7] Standard error in X kpc stat.error;pos.cartesian.x float Y [-6.3/15.6] Galactic position along Galactic rotation kpc pos.distance;pos.cartesian.y;pos.galactic float e_Y [0/6.1] Standard error in Y kpc stat.error;pos.cartesian.y float Z [-12.8/12.3] Galactic position towards north Galactic pole kpc pos.distance;pos.galactic float e_Z [0/8.5] Standard error in Z kpc stat.error;src.redshift float U [-397/473] Galactic radial velocity positive towards Galactic center km/s spect.dopplerVeloc;pos.galactic int e_U [0/257]? Standard error in U km/s stat.error;pos.cartesian.x int nullable V [-457/479] Galactic rotational velocity along Galactic rotation km/s phys.veloc.rotat;pos.galactic int e_V [0/381] Standard error in V km/s stat.error;pos.cartesian.y int W [-284/318] Galactic velocity towards north Galactic pole km/s phys.veloc;pos.galactic int Rap [5.8/901] Apocenter radius (1) kpc phys.size.radius float e_Rap [0/1396]? Standard error in Rap kpc stat.error float nullable Rperi [0.01/17.06] Pericenter radius (1) kpc phys.size.radius float e_Rperi [0/11] Standard error in Rperi kpc stat.error float Zmax [0.02/309] Maximum vertical height (1) kpc pos.cartesian.z;stat.max float e_Zmax [0/492] Standard error in Zmax kpc stat.error float ecc [0/1] Eccentricity (1) src.orbital.eccentricity float e_ecc [0/0.3] Standard error in ecc stat.error float Jz [-4785/6294] Z-component of angular momentum (1) kpc.km**-1.s**-1 phys.angMomentum double e_Jz [0.25/5131] Standard error in Jz kpc.km**-1.s**-1 stat.error float zn [0/18] Normalised z-extent of the orbit (1) src.orbital float e_zn [0/8] Standard error in zn stat.error float Group [0/4] Group name for He-rich stars (2) src.class int pTH Probability in thin disk % stat int pTK Probability in thick disk % stat int pH Probability in halo % stat int
J/ApJS/256/28/table2 The excluded targets from the Gaia DR2 catalogue of hot subdwarf star candidates with spectra from LAMOST DR7 recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int e_Plx [0.01/0.7]? Standard error in Plx mas stat.error;pos.parallax float nullable pmRA [-42/42.2]? Gaia EDR3 proper motion in RA mas/yr pos.pm;pos.eq.ra float nullable Simbad Simbad column added by the CDS meta.ref.url char LAMOST LAMOST target (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char GaiaEDR3 Unique Gaia EDR3 source identifier meta.id.cross RA_ICRS Barycentric Right Ascension (ICRS) deg pos.eq.ra;meta.main DE_ICRS Barycentric Declination (ICRS) deg pos.eq.dec;meta.main Plx [-2.5/3.9]? Gaia EDR3 stellar parallax mas pos.parallax float nullable e_pmRA [0.01/0.8]? Standard error in pmRA mas/yr stat.error;pos.pm;pos.eq.ra float nullable pmDE [-111.4/18]? Gaia EDR3 proper motion in DE mas/yr pos.pm;pos.eq.dec double nullable e_pmDE [0.01/0.6]? Standard error in pmDE mas/yr stat.error;pos.pm;pos.eq.dec float nullable Gmag [9.3/18.7]? Gaia EDR3 G-band magnitude mag phot.mag;em.opt float nullable BP-RP [-0.6/1.3]? Gaia EDR3 BP-RP color index mag phot.color;em.opt.B;em.opt.R float nullable spClass Spectra classification (1) src.class char G19 Display data from Geier+, 2019, J/A+A/621/A38 within 1" meta.ref.url int nullable DR4+5 Display data from LAMOST -DR4 (V/153) and -DR5 (V/164) within 0.5" meta.ref.url int nullable