{
  "id": "1503.07522",
  "version": "v1",
  "published": "2015-03-25T20:00:21.000Z",
  "updated": "2015-03-25T20:00:21.000Z",
  "title": "A two-parameter criterion for classifying the explodability of massive stars by the neutrino-driven mechanism",
  "authors": [
    "T. Ertl",
    "H. -Th. Janka",
    "S. E. Woosley",
    "T. Sukhbold",
    "M. Ugliano"
  ],
  "comment": "18 pages, 11 figures; submitted to ApJ",
  "categories": [
    "astro-ph.SR",
    "astro-ph.HE",
    "nucl-th"
  ],
  "abstract": "Thus far, judging the fate of a massive star (either a neutron star (NS) or a black hole) solely by its structure prior to core collapse has been ambiguous. Our work and previous attempts find a non-monotonic variation of successful and failed supernovae with zero-age main-sequence mass, for which no single structural parameter can serve as a good predictive measure. However, we identify two parameters computed from the pre-collapse structure of the progenitor, which in combination allow for a clear separation of exploding and non-exploding cases with only few exceptions (~1--2.5%) in our set of 621 investigated stellar models. One parameter is M4, defining the enclosed mass for a dimensionless entropy per nucleon of s = 4, and the other is mu4 = dm/dr|_{s=4}, being the mass-derivative at this location. The two parameters mu4 and M4*mu4 can be directly linked to the mass-infall rate, Mdot, of the collapsing star and the electron-type neutrino luminosity of the accreting proto-NS, L_nue ~ M_ns*Mdot, which play a crucial role in the \"critical luminosity\" concept for the theoretical description of neutrino-driven explosions as runaway phenomenon of the stalled accretion shock. All models were evolved employing the approach of Ugliano et al. for simulating neutrino-driven explosions in spherical symmetry. The neutrino emission of the accretion layer is approximated by a gray transport solver, while the uncertain neutrino emission of the 1.1 Msun proto-NS core is parametrized by an analytic model. The free parameters connected to the core-boundary prescription are calibrated to reproduce the observables of Supernova 1987A for five different progenitor models.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-03-25T20:00:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "massive star",
      "two-parameter criterion",
      "neutrino-driven mechanism",
      "explodability",
      "neutrino-driven explosions"
    ],
    "publication": {
      "doi": "10.3847/0004-637X/818/2/124"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1356229
    }
  }
}