Refined M-type Star Catalog from LAMOST DR10: Measurements of Radial Velocities, $T_{\text{eff}}$, log $g$, [M/H] and [$\alpha$/M]

Abstract

Precise stellar parameters for M-type stars, the Galaxy's most common stellar type, are crucial for numerous studies. In this work, we refined the LAMOST DR10 M-type star catalog through a two-stage process. First, we purified the catalog using techniques including deep learning and color-magnitude diagrams to remove 22,496 non-M spectra, correct 2,078 dwarf/giant classifications, and update 12,900 radial velocities. This resulted in a cleaner catalog containing 870,518 M-type spectra (820,493 dwarfs, 50,025 giants). Second, applying a label transfer strategy using values from APOGEE DR16 for parameter prediction with a ten-fold cross-validated CNN ensemble architecture, we predicted $T_{\text{eff}}$, $\log g$, [M/H], and [$\alpha$/M] separately for M dwarfs and giants. The average internal errors for M dwarfs/giants are respectively: $T_{\text{eff}}$ 30/17 K, log $g$ 0.07/0.07 dex, [M/H] 0.07/0.05 dex, and [$\alpha$/M] 0.02/0.02 dex. Comparison with APOGEE demonstrates external precisions of 34/14 K, 0.12/0.07 dex, 0.09/0.04 dex, and 0.03/0.02 dex for M dwarfs/giants, which represents precision improvements of over 20\% for M dwarfs and over 50\% for M giants compared to previous literature results. The catalog is available at https://nadc.china-vo.org/res/r101668/.

References in corpus (32)

• The Gaia mission
• Gaia Data Release 3: Summary of the content and survey properties
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• The Radial Velocity Experiment (RAVE): first data release
• The GALAH Survey: Scientific Motivation
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
• Gaia Data Release 3 Properties and validation of the radial velocities
• Gaia Data Release 3: Processing and validation of BP/RP low-resolution spectral data
• The Solar Neighborhood XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc
• Gaia Data Release 3: Apsis II -- Stellar Parameters
• A candidate short-period sub-Earth orbiting Proxima Centauri
• The CARMENES search for exoplanets around M dwarfs. Stellar atmospheric parameters of target stars with SteParSyn
• The CARMENES search for exoplanets around M dwarfs -- Photospheric parameters of target stars from high-resolution spectroscopy. II. Simultaneous multiwavelength range modeling of activity insensitive lines
• Planetary system LHS 1140 revisited with ESPRESSO and TESS
• Stellar Initial Mass Function Varies with Metallicities and Time
• Empirical temperature- and extinction-dependent extinction coefficients for the GALEX, Pan-STARRS1, Gaia, SDSS, 2MASS, and WISE passbands
• The Fifth Catalogue of Nearby Stars (CNS5)
• A blue depression in the optical spectra of M dwarfs
• Gaia Data Release 3: A Golden Sample of Astrophysical Parameters
• Stellar parametrization of LAMOST M dwarf stars
• Tracing Kinematic and Chemical Properties of Sagittarius Stream by K-Giants, M-Giants, and BHB stars
• The CARMENES search for exoplanets around M dwarfs -- A deep learning approach to determine fundamental parameters of target stars
• The CARMENES search for exoplanets around M dwarfs, Wolf 1069 b: Earth-mass planet in the habitable zone of a nearby, very low-mass star
• Stellar Atmospheric Parameters of M-type Stars from LAMOST DR8
• Using autoencoders and deep transfer learning to determine the stellar parameters of 286 CARMENES M dwarfs
• M Subdwarf Research. II. Atmospheric Parameters and Kinematics
• The CARMENES search for exoplanets around M dwarfs -- A deep transfer learning method to determine Teff and [M/H] of target stars
• S-type stars discovered in Medium-Resolution Spectra of LAMOST DR9
• Atmospheric parameters and kinematic information for the M giants stars from LAMOST DR9
• Estimating Stellar Atmospheric Parameters and [α/Fe] for LAMOST O-M type Stars Using a Spectral Emulator