Journal
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Volume 253, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.3847/1538-4365/abe1c1
Keywords
M dwarf stars; Astronomy data analysis; Low mass stars; Catalogs
Categories
Funding
- National Key R&D Program of China [2019YFA0405500]
- National Natural Science Foundation of China (NSFC) [11835057]
- National Development and Reform Commission
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M dwarf stars, the most common stars in the Galaxy, have crucial stellar parameters that are difficult to determine accurately. Researchers used the SLAM model to measure the parameters of M dwarf stars, showing good agreement with previous studies.
The M dwarf stars are the most common stars in the Galaxy, dominating the population of the Galaxy at faint magnitudes. Precise and accurate stellar parameters for M dwarfs are of crucial importance for many studies. However, the atmospheric parameters of M dwarf stars are difficult to determine. In this paper, we present a catalog of the spectroscopic stellar parameters (T-eff and [M/H]) of similar to 300,000 M dwarf stars observed by both LAMOST and Gaia using the Stellar LAbel Machine (SLAM). We train a SLAM model using LAMOST spectra with APOGEE Data Release 16 labels with 2800 K < T-eff < 4500K and -2 dex < [M/H] < 0.5 dex. The SLAM T-eff is in agreement to within similar to 50 K compared to the previous study determined by APOGEE observations, and the SLAM [M/H] agrees within 0.12 dex compared to the APOGEE observation. We also set up a SLAM model trained by the BT-Settl atmospheric model with random uncertainties (in cross validation) to 60 K and agreeing within similar to 90 K compared to previous studies.
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