{
  "id": "1906.07171",
  "version": "v1",
  "published": "2019-06-16T20:44:30.000Z",
  "updated": "2019-06-16T20:44:30.000Z",
  "title": "Brightest point in accretion disk and black hole spin: Implication to the image of black hole M87*",
  "authors": [
    "Vyacheslav I. Dokuchaev",
    "Natalia O. Nazarova"
  ],
  "comment": "6 pages, 6 figures. arXiv admin note: text overlap with arXiv:1903.09594",
  "categories": [
    "astro-ph.HE",
    "gr-qc"
  ],
  "abstract": "A dark region and a bright part of accretion disk are viewed on the first image of the supermassive black hole in the galaxy M87 obtained by the Event Horizon Telescope. We demonstrate that a viewed dark region is a silhouette of the black hole event horizon, while the outline (contour) of this silhouette is an equator of the event horizon globe. A dark silhouette of the black hole event horizon is placed within the expected position of the black hole shadow, which is not revealed on the first image. We calculate numerically a relation between the viewed position of the black hole silhouette and the brightest point in a thin accretion disk in dependence of the black hole spin. A spin of the supermassive black hole in the galaxy M87, derived from this relation, is $a=0.75\\pm0.15$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-06-16T20:44:30.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole spin",
      "accretion disk",
      "brightest point",
      "black hole event horizon",
      "supermassive black hole"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}