Supernova theory - the search for a robust mechanism. The Wetherill Prize lecture.

Details Supernova theory - the search for a robust mechanism. The Wetherill Prize lecture. Supernova theory - the search for a robust mechanism. The Wetherill Prize lecture.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phr...256....5c&link_type=abstract

Physics Reports, Vol. 256, No. 1 - 3, p. 5 - 21

Physics

3

Supernovae: Explosions, Supernovae: Neutron Stars

Scientific paper

The last matter that accretes onto a deleptonized neutron star releases the most specific energy per gram. We therefore believe that a robust mechanism for the explosion of a supernova must then depend upon the last accreted matter. After a time of a second or more the accretion of this matter onto a condensed or deleptonized neutron star, due to the large incremental gravitational binding energy, gives rise to a high temperature atmosphere. Because of this high temperature, ≡10 MeV, neutrinos of high energy, ≡50 MeV, efficiently deposit their energy in expanding high entropy bubbles. The bubble expansion rate runs away due to both the heating rate and the bubble size. When these bubbles expand fast enough, faster than the local sound speed or free fall speed of the heavier shocked matter above, the heavier matter will be blown away before reaching the neutron star surface, thus terminating the explosion. The explosion therefore terminates the explosion process itself, the definition of a robust mechanism.

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