{
  "id": "1212.0905",
  "version": "v2",
  "published": "2012-12-04T23:47:33.000Z",
  "updated": "2013-01-31T04:35:00.000Z",
  "title": "The mass ejection from the merger of binary neutron stars",
  "authors": [
    "Kenta Hotokezaka",
    "Kenta Kiuchi",
    "Koutarou Kyutoku",
    "Hirotada Okawa",
    "Yu-ichiro Sekiguchi",
    "Masaru Shibata",
    "Keisuke Taniguchi"
  ],
  "comment": "28 pages, 19 figures, accepted to Physical Review D",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Numerical-relativity simulations for the merger of binary neutron stars are performed for a variety of equations of state (EOSs) and for a plausible range of the neutron-star mass, focusing primarily on the properties of the material ejected from the system. We find that a fraction of the material is ejected as a mildly relativistic and mildly anisotropic outflow with the typical and maximum velocities $\\sim 0.15$ -- $0.25c$ and $\\sim 0.5$ -- $0.8c$ (where $c$ is the speed of light), respectively, and that the total ejected rest mass is in a wide range $10^{-4}$ -- $10^{-2}M_{\\odot}$, which depends strongly on the EOS, the total mass, and the mass ratio. The total kinetic energy ejected is also in a wide range between $10^{49}$ and $10^{51} {\\rm ergs}$. The numerical results suggest that for a binary of canonical total mass $2.7M_{\\odot}$, the outflow could generate an electromagnetic signal observable by the planned telescopes through the production of heavy-element unstable nuclei via the $r$-process or through the formation of blast waves during the interaction with the interstellar matter, if the EOS and mass of the binary are favorable ones.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-01-31T04:35:00.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "04.30.-w",
      "04.25.D-",
      "04.40.Dg"
    ],
    "keywords": [
      "binary neutron stars",
      "mass ejection",
      "wide range",
      "total mass",
      "total ejected rest mass"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevD.87.024001",
      "journal": "Physical Review D",
      "year": 2013,
      "month": "Jan",
      "volume": 87,
      "number": 2,
      "pages": "024001"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 28,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1205598,
      "adsabs": "2013PhRvD..87b4001H"
    }
  }
}