{
  "id": "0912.3577",
  "version": "v2",
  "published": "2009-12-18T03:07:01.000Z",
  "updated": "2009-12-20T18:18:25.000Z",
  "title": "Long-Term Evolution of Collapsar: Mechanism of Outflow Production",
  "authors": [
    "Seiji Harikae",
    "Tomoya Takiwaki",
    "Kei Kotake"
  ],
  "comment": "6 pages, 8 figures, eConf Proceedings C091122, 2009 Fermi Symposium, November 2-5",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We present our numerical results of two-dimensional hydrodynamic (HD) simulations and magnetohydrodynamic (MHD) simulations of the collapse of rotating massive stars in light of the collapsar model of gamma-ray bursts (GRBs). Pushed by recent evolution calculations of GRB progenitors, we focus on lower angular momentum of the central core than the ones taken mostly in previous studies. By performing special relativistic simulations including both realistic equation of state and neutrino cooling, we follow a long-term evolution of the slowly rotating collapsars up to 10 s, accompanied by the formation of jets and accretion disks. We find such outfows can be launched both by MHD process and neutrino process. We investigeate the properties of these jets whether it can become GRBs or remains primary weak outflow.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-12-20T18:18:25.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "long-term evolution",
      "outflow production",
      "remains primary weak outflow",
      "performing special relativistic simulations",
      "lower angular momentum"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 840573,
      "adsabs": "2009arXiv0912.3577H"
    }
  }
}