Early-type star stellar rotations in LAMOST MRS. I. J/ApJS/257/22 ivo://CDS.VizieR/J/ApJS/257/22 doi:10.26093/cds/vizier.22570022 CDS Sun W. Duan X.-W. Deng L. de Grijs R. Zhang Bo Liu C. 2022-09-30T21:57:56Z 2022-03-31T14:57:23Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr early-type-stars effective-temperature visible-astronomy spectroscopy radial-velocity chemical-abundances stellar-masses surveys We derive stellar parameters and abundances ("stellar labels") of 40034 late-B and A-type main-sequence stars extracted from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Medium Resolution Survey (LAMOST-MRS). The primary selection of our early-type sample was obtained from LAMOST Data Release 7 based on spectral-line indices. We employed the Stellar Label Machine to derive their spectroscopic stellar parameters, drawing on Kurucz spectral synthesis models with 6000<Teff<15000K and -1<[M/H]<1dex. For a signal-to-noise ratio of ~60, the cross validated scatter is ~75K, 0.06dex, 0.05dex, and ~3.5km/s for Teff, logg, [M/H], and vsini, respectively. A comparison with objects with prior known stellar labels shows great consistency for all stellar parameters, except for logg. Although this is an intrinsic caveat that comes from the MRS's narrow wavelength coverage, it only has a minor effect on estimates of the stellar rotation rates because of the decent spectral resolution and the profile-fitting method employed. The masses and ages of our early-type sample stars were inferred from nonrotating stellar evolution models. This paves the way for reviewing the properties of stellar rotation distributions as a function of stellar mass and age. 2021ApJS..257...22S https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/257/22 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to B/pastel : The PASTEL catalogue (Soubiran+, 2016-) B/pollux : POLLUX database of synthetic stellar spectra (Palacios+ 2010-2021) III/226 : Rotational Velocities of Stars (Glebocki+ 2000) I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021) V/146 : LAMOST DR1 catalogs (Luo+, 2015) V/153 : LAMOST DR4 catalogs (Luo+, 2018) I/350 : Gaia EDR3 (Gaia Collaboration, 2020) J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994) J/A+A/381/105 : Rotational velocities of A-type stars. I. (Royer+, 2002) J/A+A/393/897 : Rotational velocities of A-type stars II. (Royer+, 2002) J/ApJ/648/591 : Stellar rotation in young clusters. II. (Huang+, 2006) J/ApJ/648/580 : Rotational velocities in 19 open clusters (Huang+, 2006) J/ApJ/718/683 : The edge of the young Galactic disk (Carraro+, 2010) J/ApJ/722/605 : A stellar rotation census of B stars (Huang+, 2010) J/A+A/530/A115 : Rotating massive MS stars evolutionary models (Brott+, 2011) J/A+A/531/A143 : Rotational velocities of HR stars (Diaz+, 2011) J/A+A/537/A146 : Stellar models with rot. 0.8<M<120, Z=0.014 (Ekstrom+, 2012) J/A+A/537/A120 : Rotational velocities of A-type stars. IV. (Zorec+, 2012) J/MNRAS/449/1401 : Am stars candidates from LAMOST DR1 (Hou+, 2015) J/ApJ/808/16 : Cannon: a new approach to determine abundances (Ness+, 2015) J/AJ/153/99 : Galactic outer disk: toward Tombaugh 1 (Carraro+, 2017) J/A+A/616/L15 : Parallaxes and Proper Motions of OB stars (Xu+, 2018) J/ApJS/241/32 : OB stars from the LAMOST DR5 spectra (Liu+, 2019) J/ApJS/245/34 : Abund. for 6 million stars from LAMOST DR5 (Xiang+, 2019) J/ApJS/246/9 : Stellar parameters of LAMOST stars using SLAM (Zhang+, 2020) J/ApJ/891/23 : Stellar abundances from LAMOST MRS (SPCAnet) (Wang+, 2020) J/A+A/649/A3 : Gaia EDR3 photometric passbands (Riello+, 2021) 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/257/22 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/257/22 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/257/22 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/257/22 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/257/22 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/257/22 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJS/257/22/table1 (Catalog of stellar parameters from LAMOST DR7 medium-resolution survey (MRS) spectra and Gaia EDR3) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/257/22/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/257/22/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/257/22/table1? 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32456 32458-32459 32474-32475 32483 32486-32487 32492 32500 32509-32510 32523-32525 32545-32547 32552 32557-32558 32560 32562 32576-32577 32579 32588-32590 32592 32594 32640 32694-32695 32699 32702-32703 32739 32744 44923 45008 45017 45020 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/257/22?format=ascii Optical default J/ApJS/257/22/table1 Catalog of stellar parameters from LAMOST DR7 medium-resolution survey (MRS) spectra and Gaia EDR3 [M/H] [-1.34/0.7] Metallicity from SLAM phys.abund.Z float chi2r [0.06/28.5] {chi}^2 estimate of best fit of red arm meta.note float Simbad Simbad column added by the CDS meta.ref.url char _RA.icrs Right ascension (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) deg pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) deg pos.eq.dec nullable indexed recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int GaiaEDR3 Gaia EDR3 source identifier meta.id;meta.main obsid [588904135/747816243] LAMOST MRS observation identifier meta.id;obs.param;obs long RA_ICRS Gaia EDR3 right ascension (ICRS) at Ep=2016.0 deg pos.eq.ra;meta.main indexed DE_ICRS Gaia EDR3 declination (ICRS) at Ep=2016.0 deg pos.eq.dec;meta.main indexed EWHa [2.4/10] Line indice, H{alpha} equivalent width, Angstroms 0.1nm spect.line.eqWidth float EWMg [-0.2/10] Line indice, Mg Ib equivalent width, Angstroms 0.1nm spect.line.eqWidth float RVelb [-249.2/250] Radial velocity, blue arm km/s phys.veloc;pos.heliocentric float RVelr [-204/184] Radial velocity, red arm km/s phys.veloc;pos.heliocentric float Teff [7000/14499] Effective temperature from SLAM K phys.temperature.effective int e_Teff [0/401] Uncertainty in Teff K stat.error;phys.temperature.effective int logg [3.13/4.84] Surface gravity from SLAM log(cm.s**-2) phys.gravity float e_logg [0/0.5] Uncertainty in logg log(cm.s**-2) stat.error float e_[M/H] [0/0.3] Uncertainty in [M/H] stat.error;phys.abund float vsini [3.5/449.5] Projected rotation velocity from SLAM km/s phys.veloc.rotat float e_vsini [0/18] Uncertainty in vsini km/s stat.error;phys.veloc.rotat float logLstar [0.7/3.4] Logarithmic luminosity log(solLum) phys.luminosity float e_logLstar [0.012/0.12] Uncertainty in logLstar log(solLum) stat.error float Mstar [1.5/6.1] Stellar mass solMass phys.mass float e_Mstar [0/0.1] Uncertainty in Mstar solMass stat.error float t/tms [0/1] Life span from the zero-age main sequence (ZAMS) to the terminal-age main sequence (TAMS) time.interval float e_t/tms [0/0.15] Uncertainty in t/tms stat.error float SNRb [0/999] Signal-to-noise ratio, blue arm stat.snr float SNRr [0/999] Signal-to-noise ratio, red arm stat.snr float chi2b [0/24] {chi}^2 estimate of best fit of blue arm meta.note float