Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-12
Phys.Rev.Lett.100:011101,2008; Phys.Rev.Lett.100:011101, 2008
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, 1 table
Scientific paper
10.1103/PhysRevLett.100.011101
Based on the shell model for Gamow-Teller and the Random Phase Approximation for forbidden transitions, we have calculated reaction rates for inelastic neutrino-nucleus scattering (INNS) under supernova (SN) conditions, assuming a matter composition given by Nuclear Statistical Equilibrium. The rates have been incorporated into state-of-the-art stellar core-collapse simulations with detailed energy-dependent neutrino transport. While no significant effect on the SN dynamics is observed, INNS increases the neutrino opacities noticeably and strongly reduces the high-energy tail of the neutrino spectrum emitted in the neutrino burst at shock breakout. Relatedly the expected event rates for the observation of such neutrinos by earthbound detectors are reduced by up to about 60%.
Hix William Raphael
Janka H.-Th.
Juodagalvis Andrius
Langanke Karlheinz
Marek Andreas
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