Physics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..265b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 1, 1988, p. 265-276.
Physics
32
Neutrinos, Stellar Physics, Supernova 1987A, Maximum Likelihood Estimates, Monte Carlo Method, Neutron Stars, Statistical Analysis, Stellar Temperature
Scientific paper
A joint likelihood analysis of the 11 Kamiokande plus eight IMB neutrino events from SN 1987A is made. The results are consistent with a neutron star cooling rapidly from an initial temperature of 4.2 + or - 0.5 MeV down to 3 MeV in 2 s and slowly thereafter. The best-fit cooling function is approximately that of a degenerate nu(e) gas diffusing out of a neutronized core collapsed to nuclear density. This cooling model fits the decrease in average event rate and neutrino energy and the 7 s gap in the Kamiokande data better than any constant temperature or exponentially cooling model. The total of N(0) = (1.3 + or - 0.4) x 10 to the 58th anti-nu(e) released with energy E(0) = (9 + or - 3) x 10 to the 52nd ergs implies a total energy release in three flavors of neutrinos and antineutrinos of (5 + or - 2) x 10 to the 53rd ergs, consistent with the binding energy released when a core more massive than 1.45 solar mass collapses with a soft equation of state.
Bludman Sidney A.
Schinder Paul J.
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