{
  "id": "2012.14080",
  "version": "v1",
  "published": "2020-12-28T03:46:39.000Z",
  "updated": "2020-12-28T03:46:39.000Z",
  "title": "Stellar parametrization of LAMOST M dwarf stars",
  "authors": [
    "Jiadong Li",
    "Chao Liu",
    "Bo Zhang",
    "Hao Tian"
  ],
  "comment": "17 pages, 6 figures, submitted to ApJS",
  "categories": [
    "astro-ph.SR",
    "astro-ph.EP",
    "astro-ph.GA"
  ],
  "abstract": "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.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-12-28T03:46:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "dwarf stars",
      "stellar parametrization",
      "slam model",
      "apogee observation",
      "stellar label machine"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}