SN1-2 - (SN1) Supernova Explosions and Neutron Stars Dynamics - (SN2) Numerical simulations, SN, and GRB, connecting with massive SN |
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Speaker |
Kushnir, Doron |
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| Talk Title |
Thermonuclear Explosions of Rotating Massive Stars Could Explain Core-Collapse Supernovae |
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Abstract |
It is widely thought that core-collapse supernovae (CCSNe) are due to energy deposition by neutrinos, but so far not demonstrated from first principles. It was recently shown with one-dimensional (1D) simulations, that if the neutrinos failed to explode the star, a thermonuclear explosion of the outer shells is possible. However, the kinetic energy of the ejecta (Ekin) was small and negligible amounts of Ni56 were ejected, implying that these 1D collapse induced thermonuclear explosions (CITE) are unlikely to represent typical CCSNe. I provide evidence supporting a scenario in which the majority of CCSNe are the result of CITE. I show that collapse of stars that include slowly (few percent of breakup) rotating 0.1-10 Msun shells of mixed helium-oxygen, lead to explosions with Ekin in the range of 1e49-1e52 erg, and Ni56 yields of up to ~1 Msun, which are correlated, in agreement with observations. Stronger explosions are predicted from higher mass progenitors in agreement with observation, and in contrast to the neutrino mechanism. Neutron stars are produced in weak ~<1e51 erg explosions, while strong >~1e51 erg explosions leave black hole remnants. |
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