{
  "id": "0910.3655",
  "version": "v2",
  "published": "2009-10-19T19:29:09.000Z",
  "updated": "2010-03-12T15:33:03.000Z",
  "title": "Shock-heating of stellar envelopes: A possible common mechanism at the origin of explosions and eruptions in massive stars",
  "authors": [
    "Luc Dessart",
    "Eli Livne",
    "Roni Waldman"
  ],
  "comment": "20 pages, 16 figures, 2 tables; accepted to MNRAS",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Observations of transient phenomena in the Universe reveal a spectrum of mass-ejection properties associated with massive stars, covering from Type II/Ib/Ic core-collapse supernovae (SNe) to giant eruptions of Luminous Blue Variables (LBV) and optical transients. Here, we hypothesize that a fraction of these phenomena may have an explosive origin, the distinguishing ingredient being the ratio of the prompt energy release E_dep to the envelope binding energy E_binding. Using one-dimensional one-group radiation hydrodynamics and a set of 10-25Msun, massive-star models, we explore the dynamical response of a stellar envelope subject to a strong, sudden, and deeply-rooted energy release. Following energy deposition, a shock systematically forms, crosses the progenitor envelope on a day timescale, and breaks-out with a signal of hour-to-days duration and a 10^5-10^11 Lsun luminosity. For E_dep > E_binding, full envelope ejection results with a SN-like bolometric luminosity and kinetic energy, modulations being commensurate to the energy deposited and echoing the diversity of Type II-Plateau SNe. For E_dep ~ E_binding, partial envelope ejection results with a small expansion speed, and a more modest but year-long luminosity plateau, reminiscent of LBV eruptions or so-called SN impostors. For E_dep < E_binding, we obtain a \"puffed-up\" star, secularly relaxing back to thermal equilibrium. In parallel with gravitational collapse and Type II SNe, we argue that the thermonuclear combustion of merely a few 0.01Msun of C/O could power a wide range of explosions/eruptions in loosely-bound massive stars, as those in the 8-12Msun range, or in more massive ones owing to their proximity to the Eddington limit and/or critical rotation.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-03-12T15:33:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "massive stars",
      "common mechanism",
      "one-dimensional one-group radiation hydrodynamics",
      "explosions",
      "full envelope ejection results"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1111/j.1365-2966.2010.16626.x",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2010,
      "month": "Jul",
      "volume": 405,
      "number": 4,
      "pages": 2113
    },
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 834455,
      "adsabs": "2010MNRAS.405.2113D"
    }
  }
}