Statistics – Computation
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...185l...5s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 185, no. 1-2, Oct. 1987, p. L5, L6.
Statistics
Computation
9
Binary Stars, Black Holes (Astronomy), Neutrino Beams, Neutron Stars, Stellar Evolution, Supernova 1987A, Angular Momentum, Computational Astrophysics, Energy Dissipation, Magellanic Clouds, Roche Limit, Stellar Mass
Scientific paper
In correspondence to SN 1987A two neutrino bursts were reported separated by ≡4.7 hr. Assuming that both of them are real, the authors propose a picture where the first supernova explosion generates a very close binary system (Porb ≡ 0.2 s) consisting of two collapsed objects, a neutron star plus a neutron star or a black hole. The evolution of the system is dominated by gravitational radiation energy losses, and after a few hours the lighter component fills its Roche lobe. Then matter starts to be transferred at a huge rate and on a timescale of very low1 s most of the mass of the lighter neutron star is expelled from its Roche lobe and accreted by the primary. In this process an energy of ≡1053ergs is released, which may explain the second neutrino burst.
Stella Luigi
Treves Aldo
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