{
  "id": "0908.0431",
  "version": "v1",
  "published": "2009-08-04T12:25:21.000Z",
  "updated": "2009-08-04T12:25:21.000Z",
  "title": "Magnetic inversion as a mechanism for the spectral transition of black hole binaries",
  "authors": [
    "Igor V. Igumenshchev"
  ],
  "comment": "5 plot files are attached separately. Accepted by the ApJL",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "A mechanism for the transition between low/hard, high/soft, and steep power law (SPL) spectral states in black hole X-ray binaries is proposed. The low/hard state is explained by the development of a magnetically arrested accretion disk attributable to the accumulation of a vertical magnetic field in a central bundle. This disk forms powerful jets and consists of thin spiral accretion streams of a dense optically thick plasma surrounded by hot, magnetized, optically thin corona, which emits most of the energy in hard X-rays. State transition occurs because of the quasi-periodic or random inversion of poloidal magnetic fields in the accretion flow supplied by the secondary star. The inward advection of the inverted field results in a temporal disappearance of the central bundle caused by the annihilation of the opposed fields and restoration of the optically thick disk in the innermost region. This disk represents the high/soft state. The SPL state develops at the period of intensive field annihilation and precedes the high/soft state. The continuous supply of the inverted field leads to a new low/hard state because of the formation of another magnetically arrested disk.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-08-04T12:25:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole binaries",
      "magnetic inversion",
      "spectral transition",
      "optically thick plasma",
      "arrested accretion disk attributable"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/702/1/L72",
      "journal": "The Astrophysical Journal",
      "year": 2009,
      "month": "Sep",
      "volume": 702,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 827793,
      "adsabs": "2009ApJ...702L..72I"
    }
  }
}