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Title: Three-dimensional simulation of a rotating supernova

We investigate the effects of rotation on the evolution of core-collapse supernova explosion using a 15 solar mass progenitor model with a variety of neutrino luminosity and rotational velocity. Stars should have some amount of angular momentum, which would affect stellar evolution and its final explosion. In this paper we focus on the effect of rotation on gravitational collapse of a core, on a core bounce of accreting matter, and on subsequent generation and evolution of a shock wave. We find that the rotation plays a positive role for supernova explosions. More rapidly rotating models present more rapid expansion of the shock front and more energetic explosions. When the rotational speed is moderate, the shock once stalls at about 200 km away from the center similarly to a non-rotating model. Then the rotating progenitor experiences effective neutrino heating especially around an equatorial plane and explodes even with somewhat low neutrino luminosity for which the non-rotating model cannot overcome accreting matter and finally collapses. When the rotational speed is fast, the shock expands to about 300 km immediately after the core bounce and then evolves to move outward without shock stalling. We conclude that this positive effect of rotation to explosionsmore » is dominant against some possible negative aspects, for example, lower neutrino luminosity caused by less contraction of the rotating core.« less
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Faculty of Science and Engineering, Waseda University, Ohkubo 3-4-1, Shinjuku, Tokyo 169-8555 (Japan)
  2. Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel (Switzerland)
  3. Center for Computational Astrophysics, National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka, Tokyo 181-8588 (Japan)
  4. Department of Applied Physics, Fukuoka University, Jonan, Fukuoka 814-0180 (Japan)
Publication Date:
OSTI Identifier:
22280474
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1594; Journal Issue: 1; Conference: OMEG12: 12. international symposium on origin of matter and evolution of galaxies, Tsukuba (Japan), 18-21 Nov 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANGULAR MOMENTUM; ASTROPHYSICS; COMPUTERIZED SIMULATION; COSMIC NEUTRINOS; COSMOLOGY; GRAVITATIONAL COLLAPSE; LUMINOSITY; ROTATION; SHOCK WAVES; STAR EVOLUTION; STARS; THREE-DIMENSIONAL CALCULATIONS; VELOCITY