{
  "id": "1908.01989",
  "version": "v1",
  "published": "2019-08-06T07:17:47.000Z",
  "updated": "2019-08-06T07:17:47.000Z",
  "title": "New study of the line profiles of sodium perturbed by H2",
  "authors": [
    "N. F. Allard",
    "F. Spiegelman",
    "T. Leininger",
    "P. Molliere"
  ],
  "categories": [
    "astro-ph.SR",
    "astro-ph.EP"
  ],
  "abstract": "The opacity of alkali atoms, most importantly of Na and K, plays a crucial role in the atmospheres of brown dwarfs and exoplanets. We present a comprehensive study of NaH2 collisional profiles at temperatures from 500 to 3000 K, the temperatures prevailing in the atmosphere of brown dwarfs and Jupiter-mass planets.The relevant H2 perturber densities reach several 10^19 cm^-3 in hot Teff > 1500 K Jupiter-mass planets and can exceed 10^20 cm^-3 for more massive or cooler objects. Accurate pressure-broadened profiles that are valid at high densities of H2 should be incorporated into spectral models. Unified profiles of sodium perturbed by molecular hydrogen were calculated in the semi-classical approach using up-to-date molecular data.New NaH2 collisional profiles and their effects on the synthetic spectra of brown dwarfs and hot Jupiters computed with petitCODE are presented.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-08-06T07:17:47.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "line profiles",
      "brown dwarfs",
      "nah2 collisional profiles",
      "relevant h2 perturber densities reach",
      "jupiter-mass planets"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}