Neutrino Annihilation between Binary Neutron Stars

Details Neutrino Annihilation between Binary Neutron Stars Neutrino Annihilation between Binary Neutron Stars

2001-08-10

arxiv.org/abs/astro-ph/0108196v1

Astrophys.J. 561 (2001) 950-956

Astronomy and Astrophysics

Astrophysics

15 pages, 6 figures, accepted for publication in The Astrophysical Journal

Scientific paper

10.1086/323319

We calculate the neutrino pair annihilation rate into electron pairs between two neutron stars in a binary system. We present a closed formula for the energy deposition rate at any point between the stars, where each neutrino of a pair derives from each star, and compare this result to that where all neutrinos derive from a single neutron star. An approximate generalization of this formula is given to include the relativistic effects of gravity. We find that this inter-star neutrino annihilation is a significant contributor to the energy deposition between heated neutron star binaries. In particular, for two neutron stars near their last stable orbit, inter-star neutrino annihilation energy deposition is almost equal to that of single star energy deposition.

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