论文标题
Lamost M矮星的恒星参数化
Stellar parametrization of LAMOST M dwarf stars
论文作者
论文摘要
M矮星是银河系中最常见的恒星，在微弱的幅度下以数字为主导了银河系的种群。对于许多研究，M矮人的精确和准确的恒星参数至关重要。但是，很难确定M矮星的大气参数。在本文中，我们介绍了光谱恒星参数（$ t_ {eff} $和[m/h]）的$ \ sim $ 300,000 m矮人星星，lamost和gaia都使用Stellar Label Machine（Slam）观察到。我们使用带有Apogee Data Release 16（DR16）标签的Lamost Spectra训练SLAM模型，其$ 2800 \ lt t_ {eff} \ lt 4500 $ k和$ -2 \ lt [m/h] \ lt 0.5 $ dex。与Apogee观察确定的先前研究相比，SLAM $ t_ {eff} $与$ \ sim 50 $ K之内的同意在$ \ sim 50 $ k之内，而SLAM [m/h]与Apogee观察相比在0.12 DEX之内同意。我们还建立了一个由BT-SETTL大气模型训练的SLAM模型，与先前的研究相比，在$ \ sim 90 $ K中具有随机的不确定性（在交叉验证中）为60k。
M dwarf stars are the most common stars in the Galaxy, dominating the population of the Galaxy by numbers 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 be determined. In this paper, we present a catalog of the spectroscopic stellar parameters ($T_{eff}$ and [M/H]) of $\sim$ 300,000 M dwarf stars observed by both LAMOST and Gaia using Stellar Label Machine (SLAM). We train a SLAM model using LAMOST spectra with APOGEE Data Release 16 (DR16) labels with $2800 \lt T_{eff} \lt 4500$K and $-2 \lt [M/H] \lt 0.5$ dex. The SLAM $T_{eff}$ is in agreement to within $\sim 50$K compared to the previous study determined by APOGEE observation, and SLAM [M/H] agree within 0.12 dex compared to the APOGEE observation. We also set up a SLAM model trained by BT-Settl atmospheric model, with random uncertainties (in cross-validation) to 60K and agree within $\sim 90$K compared to previous study.
