{
  "id": "astro-ph/0509777",
  "version": "v1",
  "published": "2005-09-26T20:07:48.000Z",
  "updated": "2005-09-26T20:07:48.000Z",
  "title": "Composition, collimation, contamination: the jet of Cygnus X-1",
  "authors": [
    "Sebastian Heinz"
  ],
  "comment": "Accepted for publication in ApJ, 7 pages, 1 figure",
  "journal": "Astrophys.J.636:316-322,2005",
  "doi": "10.1086/497954",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We model the observed size and brightness of the VLBA radio core of the jet in Cygnus X-1 to derive an expression for the jet power as a function of basic jet parameters. We apply this expression to recent constraints on the jet power from observations of a large scale shocked shell around the source by Gallo et al. 2005, which leads us to a set of alternative conclusions: either (a) the jet contains large amounts of protons: more than 2000 protons per radio emitting electron, (b) it has a very low radio volume filling factor of f < 3x10^(-5), (c) the steady, radio emitting VLBA jet is not the source of the kinetic energy powering the ISM shell, or (d) its asymptotic behavior differs fundamentally from a broad set of plausible analytic jet models.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-09-26T20:07:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "composition",
      "jet power",
      "low radio volume filling factor",
      "collimation",
      "jet contains large amounts"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 693293
    }
  }
}