{
  "id": "2001.03413",
  "version": "v1",
  "published": "2020-01-10T13:08:30.000Z",
  "updated": "2020-01-10T13:08:30.000Z",
  "title": "Chromospheric Heating by Acoustic Waves Compared to Radiative Cooling: II -- Revised Grid of Models",
  "authors": [
    "Vahid Abbasvand",
    "Michal Sobotka",
    "Petr Heinzel",
    "Michal Svanda",
    "Jan Jurcák",
    "Dario del Moro",
    "Francesco Berrilli"
  ],
  "comment": "9 pages, 8 figures",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Acoustic and magnetoacoustic waves are considered to be possible agents of chromospheric heating. We present a comparison of deposited acoustic energy flux with total integrated radiative losses in the middle chromosphere of the quiet Sun and a weak plage. The comparison is based on a consistent set of high-resolution observations acquired by the IBIS instrument in the Ca II 854.2 nm line. The deposited acoustic-flux energy is derived from Doppler velocities observed in the line core and a set of 1737 non-LTE 1D hydrostatic semi-empirical models, which also provide the radiative losses. The models are obtained by scaling the temperature and column mass of five initial models VAL B-F to get the best fit of synthetic to observed profiles. We find that the deposited acoustic-flux energy in the quiet-Sun chromosphere balances 30-50 % of the energy released by radiation. In the plage, it contributes by 50-60 % in locations with vertical magnetic field and 70-90 % in regions where the magnetic field is inclined more than 50 degrees to the solar surface normal.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-01-10T13:08:30.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "acoustic waves",
      "chromospheric heating",
      "revised grid",
      "radiative cooling",
      "deposited acoustic-flux energy"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}