{
  "id": "2407.21117",
  "version": "v1",
  "published": "2024-07-30T18:18:51.000Z",
  "updated": "2024-07-30T18:18:51.000Z",
  "title": "The Nature of the Emission Spectrum of NGC 7793 P13: modeling the atmosphere of the donor star",
  "authors": [
    "A. S. Vinokurov",
    "A. E. Kostenkov",
    "K. E. Atapin",
    "Yu. N. Solovyeva"
  ],
  "comment": "17 pages, 6 figure; Accepted for publication in Astrophysical Bulletin",
  "categories": [
    "astro-ph.HE",
    "astro-ph.SR"
  ],
  "abstract": "We continue to study the ultra-luminous X-ray source NGC 7793 P13 in the optical range. In this work, we are testing the model of a spherically symmetric wind atmosphere of the donor star, previously identified as a B9 Ia supergiant. The model spectrum has shown good agreement with the observed one at a relatively high mass loss rate of $\\dot{M} \\approx 6\\times10^{-6}\\,M_{\\odot}\\,\\text{yr}^{-1}$; other parameters turned out to be close to those expected for late B-supergiants. The increased mass loss rate can be explained by the high rotation velocity of the star. In addition, we have qualitatively demonstrated the effect of X-ray irradiation on the observed spectrum and discuss the fundamental possibility of wind acceleration under conditions of powerful irradiation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-07-30T18:18:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "donor star",
      "emission spectrum",
      "relatively high mass loss rate",
      "x-ray source ngc",
      "b9 ia supergiant"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}