{
  "id": "1304.3384",
  "version": "v3",
  "published": "2013-04-11T17:48:52.000Z",
  "updated": "2016-05-02T16:13:12.000Z",
  "title": "Black Hole-Neutron Star Mergers with a Hot Nuclear Equation of State: Outflow and Neutrino-Cooled Disk for a Low-Mass, High-Spin Case",
  "authors": [
    "M. Brett Deaton",
    "Matthew D. Duez",
    "Francois Foucart",
    "Evan O'Connor",
    "Christian D. Ott",
    "Lawrence E. Kidder",
    "Curran D. Muhlberger",
    "Mark A. Scheel",
    "Bela Szilagyi"
  ],
  "comment": "Included erratum to the end of the article: affected average neutrino energy estimates",
  "journal": "ApJ 776, 47 (2013)",
  "doi": "10.1088/0004-637X/776/1/47",
  "categories": [
    "astro-ph.HE",
    "gr-qc"
  ],
  "abstract": "Neutrino emission significantly affects the evolution of the accretion tori formed in black hole-neutron star mergers. It removes energy from the disk, alters its composition, and provides a potential power source for a gamma-ray burst. To study these effects, simulations in general relativity with a hot microphysical equation of state and neutrino feedback are needed. We present the first such simulation, using a neutrino leakage scheme for cooling to capture the most essential effects and considering a moderate mass (1.4 M_{\\odot} neutron star, 5.6 M_{\\odot} black hole), high spin (black hole J/M^2=0.9) system with the K_0=220 MeV Lattimer-Swesty equation of state. We find that about 0.08 M_{\\odot} of nuclear matter is ejected from the system, while another 0.3 M_{\\odot} forms a hot, compact accretion disk. The primary effects of the escaping neutrinos are (i) to make the disk much denser and more compact, (ii) to cause the average electron fraction Y_e of the disk to rise to about 0.2 and then gradually decrease again, and (iii) to gradually cool the disk. The disk is initially hot (T~6 MeV) and luminous in neutrinos (L_{\\nu}~10^{54} erg s^{-1}), but the neutrino luminosity decreases by an order of magnitude over 50 ms of post-merger evolution.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-07-30T22:34:08.000Z",
      "comment": "16 pages, 13 figures; rearrange some text; expand methods section; improve discussion of $Y_e$ 'equilibrium'; introduce some new tests of Cowling approximation and $u_t$ measure; add a figure of secular evolution of spiral mode energy; expand discussion of luminosity",
      "journal": null,
      "doi": null
    },
    {
      "version": "v3",
      "updated": "2016-05-02T16:13:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole-neutron star mergers",
      "hot nuclear equation",
      "high-spin case",
      "neutrino-cooled disk"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/776/1/47",
      "journal": "The Astrophysical Journal",
      "year": 2013,
      "month": "Oct",
      "volume": 776,
      "number": 1,
      "pages": 47,
      "publisher": "IOP"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1227920,
      "adsabs": "2013ApJ...776...47D"
    }
  }
}