{
  "id": "1605.07235",
  "version": "v1",
  "published": "2016-05-23T22:58:49.000Z",
  "updated": "2016-05-23T22:58:49.000Z",
  "title": "Kilonova/Macronova Emission from Compact Binary Mergers",
  "authors": [
    "Masaomi Tanaka"
  ],
  "comment": "10 pages, 5 figures, review article to appear in the special issue on \"Gamma-Ray Burst in Swift/Fermi Era and Beyond\", Advances in Astronomy",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We review current understanding of kilonova/macronova emission from compact binary mergers (mergers of two neutron stars or a neutron star and a black hole). Kilonova/macronova is optical and near-infrared emission powered by radioactive decays of r-process nuclei. Emission from the dynamical ejecta with ~0.01 Msun is likely to have a luminosity of ~10^{40}-10^{41} erg s^{-1} with a characteristic timescale of about 1 week. The spectral peak is located in red optical or near-infrared wavelengths. A subsequent accretion disk wind may provide an additional luminosity, or an earlier/bluer emission if it is not absorbed by the precedent dynamical ejecta. The detection of near-infrared excess in the afterglow of short GRB 130603B and possible optical excess in GRB 060614 supports the concept of the kilonova/macronova scenario. At 200 Mpc distance, a typical brightness of kilonova/macronova with 0.01 Msun ejecta is expected to be about 22 mag and the emission rapidly fades to >24 mag within ~10 days after the merger. Kilonova/macronova candidates can be distinguished from supernovae by (1) the faster time evolution, (2) fainter absolute magnitudes, and (3) redder colors. To effectively search for such objects, follow-up survey observations with multiple visits within <10 days and with multiple filters will be important. Since the high expansion velocity (v ~ 0.1-0.2c) is a robust outcome of compact binary mergers, the detection of smooth spectra will be the smoking gun to conclusively identify the GW source.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-05-23T22:58:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "compact binary mergers",
      "kilonova/macronova emission",
      "neutron star",
      "subsequent accretion disk wind",
      "faster time evolution"
    ],
    "tags": [
      "review article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1465479
    }
  }
}