{
  "id": "1612.02882",
  "version": "v1",
  "published": "2016-12-09T01:04:34.000Z",
  "updated": "2016-12-09T01:04:34.000Z",
  "title": "Light-curve and spectral properties of ultra-stripped core-collapse supernovae leading to binary neutron stars",
  "authors": [
    "Takashi J. Moriya",
    "Paolo A. Mazzali",
    "Nozomu Tominaga",
    "Stephan Hachinger",
    "Sergei I. Blinnikov",
    "Thomas M. Tauris",
    "Koh Takahashi",
    "Masaomi Tanaka",
    "Norbert Langer",
    "Philipp Podsiadlowski"
  ],
  "comment": "15 pages, 18 figures, 2 tables, accepted by Monthly Notices of the Royal Astronomical Society",
  "categories": [
    "astro-ph.HE",
    "astro-ph.SR"
  ],
  "abstract": "We investigate light-curve and spectral properties of ultra-stripped core-collapse supernovae. Ultra-stripped supernovae are the explosions of heavily stripped massive stars which lost their envelopes via binary interactions with a compact companion star. They eject only ~ 0.1 Msun and may be the main way to form double neutron-star systems which eventually merge emitting strong gravitational waves. We follow the evolution of an ultra-stripped supernova progenitor until iron core collapse and perform explosive nucleosynthesis calculations. We then synthesize light curves and spectra of ultra-stripped supernovae using the nucleosynthesis results and present their expected properties. Ultra-stripped supernovae synthesize ~ 0.01 Msun of radioactive 56Ni, and their typical peak luminosity is around 1e42 erg/s or -16 mag. Their typical rise time is 5 - 10 days. Comparing synthesized and observed spectra, we find that SN 2005ek, some of the so-called calcium-rich gap transients, and SN 2010X may be related to ultra-stripped supernovae. If these supernovae are actually ultra-stripped supernovae, their event rate is expected to be about 1 per cent of core-collapse supernovae. Comparing the double neutron-star merger rate obtained by future gravitational-wave observations and the ultra-stripped supernova rate obtained by optical transient surveys identified with our synthesized light-curve and spectral models, we will be able to judge whether ultra-stripped supernovae are actually a major contributor to the binary neutron star population and provide constraints on binary stellar evolution.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-12-09T01:04:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ultra-stripped supernova",
      "binary neutron star",
      "ultra-stripped core-collapse supernovae leading",
      "spectral properties",
      "merge emitting strong gravitational"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}