{
  "id": "2411.07868",
  "version": "v1",
  "published": "2024-11-12T15:25:26.000Z",
  "updated": "2024-11-12T15:25:26.000Z",
  "title": "Temperature and density profiles in the corona of main-sequence stars induced by stochastic heating in the chromosphere",
  "authors": [
    "Luca Barbieri",
    "Lapo Casetti",
    "Andrea Verdini",
    "Simone Landi"
  ],
  "comment": "11 pages, 16 figures. Submitted to Astronomy and Astrophysics. Comments welcome",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "All but the most massive main-sequence stars are expected to have a rarefied and hot (million-Kelvin) corona like the Sun. How such a hot corona is formed and supported has not been completely understood yet, even in the case of the Sun. Recently, Barbieri et al. (A&A 2024, J. Plasma Phys. 2024) introduced a new model of a confined plasma atmosphere and applied it to the solar case, showing that rapid, intense, intermittent and short-lived heating events in the high chromosphere can drive the coronal plasma into a stationary state with temperature and density profiles similar to those observed in the solar atmosphere. In this paper we apply the model to main-sequence stars, showing that it predicts the presence of a solar-like hot and rarefied corona for all such stars, regardless of their mass. However, the model is not applicable as such to the most massive main-sequence stars, because the latter lack the convective layer generating the magnetic field loop structures supporting a stationary corona, whose existence is assumed by the model. We also discuss the role of stellar mass in determining the shape of the temperature and density profiles.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-11-12T15:25:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "stochastic heating",
      "temperature",
      "massive main-sequence stars",
      "chromosphere",
      "magnetic field loop structures supporting"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}