Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251..325b&link_type=abstract
Astrophysical Journal, Part 1, vol. 251, Dec. 1, 1981, p. 325-336.
Astronomy and Astrophysics
Astrophysics
58
Half Life, Leptons, Neutron Stars, Stellar Temperature, Coherent Scattering, Convection, Elastic Waves, Particle Diffusion, Proton Scattering, Stellar Evolution, Stellar Models, Stellar Structure, Supernovae, Transport Properties
Scientific paper
The half-life for excess lepton loss from the proton-neutron star is found to be approximately 0.5 sec, whether or not convection obtains. The results indicate that a positive lepton gradient forms in the outer core. In addition, it is shown that heating always accompanies deleptonization. In pure diffusion models, most of the heat is deposited in the outer core; in convective models, most is deposited in the inner core. In all cases, the increase in the pressure caused by heating is insufficient to counter the decrease in pressure brought about by the loss of lepton degeneracy pressure, and the core contracts. The heating of the shocked mantle by the core, however, is likely to cause it to expand on diffusion time scales. Since a great deal of energy (more than 10 to the 52 ergs) is deposited in the mantle by the core, the subsequent expansion of the mantle may push an accretion shock outward and aid in the production of supernovae.
Burrows Adam
Lattimer James M.
Mazurek T. J.
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