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 ∼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 ∼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 ∼90 K compared to previous studies.

M矮星是银河系中最常见的恒星，以微弱的星等为主。M 矮星的精确恒星参数对于许多研究至关重要。然而，M矮星的大气参数很难确定。在本文中，我们展示了LAMOST 和 Gaia 使用恒星标签机（SLAM）观测到的~300,000 M 矮星的光谱恒星参数（T _eff和 [M/H]）目录。我们使用带有 APOGEE Data Release 16 标签的 LAMOST 光谱训练 SLAM 模型，其中 2800 K < T _eff < 4500K 和 -2 dex < [M/H] < 0.5 dex。SLAM T _eff与由 APOGEE 观测确定的先前研究相比，在 50 K 内一致，与 APOGEE 观测相比，SLAM [M/H] 在 0.12 dex 内一致。我们还建立了一个由 BT-Settl 大气模型训练的 SLAM 模型，随机不确定性（在交叉验证中）为 60 K，与之前的研究相比在 90 K 内一致。