Refined M-type Star Catalog from LAMOST DR10: Measurements of Radial Velocities, <i>T</i> <sub>eff</sub> , log <i>g</i> , [M/H], and [ <i>α</i> /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, corrected 2078 dwarf/giant classifications, and updated 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 tenfold cross-validated convolutional neural network ensemble architecture, we predicted T eff , <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>log</mml:mi> <mml:mspace width="0.25em"/> <mml:mi>g</mml:mi> </mml:math> , [M/H], and [ α /M] separately for M dwarfs (dMs) and giants (gMs). The average internal errors for dMs/gMs are, respectively, T eff 30/17 K, log g 0.07/0.07 dex, [M/H] 0.07/0.05 dex, and [ α /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 dMs/gMs, which represent precision improvements of over 20% for dMs and over 50% for gMs compared to previous literature results. The catalog is available at doi: 10.12149/101668 .
Authors
- A-Li Luo (ORCID: https://orcid.org/0000-0001-7865-2648)
- Jing Chen (ORCID: https://orcid.org/0000-0001-8869-653X)
- Shuo Zhang (ORCID: https://orcid.org/0000-0003-1454-1636)
- Maosheng Xiang (ORCID: https://orcid.org/0000-0002-5818-8769)
- H. R. A. Jones (ORCID: https://orcid.org/0000-0003-0433-3665)
- Zhongrui Bai (ORCID: https://orcid.org/0000-0003-3884-5693)
- Youfen Wang (ORCID: https://orcid.org/0000-0001-7671-4745)
- Yin-Bi Li (ORCID: https://orcid.org/0000-0001-7607-2666)
- Shuo Li (ORCID: https://orcid.org/0000-0002-8913-3605)
- Yun-Jin Zhang (ORCID: https://orcid.org/0000-0001-7210-0666)
- Jun-Chao Liang (ORCID: https://orcid.org/0009-0001-9085-8718)
- Hailing Lu (ORCID: https://orcid.org/0000-0002-8252-8743)
- Xiao-Xiao Ma (ORCID: https://orcid.org/0000-0002-9279-2783)
Institutions
- University of Hertfordshire (GB)
- Chinese Academy of Sciences (CN)
- Nanjing Institute of Astronomical Optics & Technology (CN)
- National Astronomical Observatories (CN)
- University of Chinese Academy of Sciences (CN)
- Tsinghua University (CN)
Publication Details
- Journal
- The Astrophysical Journal Supplement Series
- Published
- 2025-12-01
- DOI
- https://doi.org/10.3847/1538-4365/ae1586
- Primary Topic
- Stellar, planetary, and galactic studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- National Aeronautics and Space Administration
- Alfred P. Sloan Foundation
- California Institute of Technology
- University of Utah
- European Space Agency
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- National Development and Reform Commission
- Office of Science
- Jet Propulsion Laboratory
- University of California, Los Angeles
- National Astronomical Observatories, Chinese Academy of Sciences