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Author Burrows, A. ♦ Mazurek, T. J. ♦ Lattimer, J. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ LEPTONS ♦ PARTICLE KINEMATICS ♦ NEUTRON STARS ♦ HEATING ♦ STAR MODELS ♦ NEUTRONS ♦ PROTONS ♦ CONVECTION ♦ DIFFUSION ♦ EQUATIONS OF STATE ♦ MATHEMATICAL MODELS ♦ SHOCK WAVES ♦ SUPERNOVAE ♦ THERMODYNAMICS ♦ BARYONS ♦ ELEMENTARY PARTICLES ♦ EQUATIONS ♦ ERUPTIVE VARIABLE STARS ♦ FERMIONS ♦ HADRONS ♦ NUCLEONS ♦ STARS ♦ VARIABLE STARS ♦ Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
Abstract We derive that the half-life for excess lepton loss from the proton-neutron star is approx.0.5 s whether or not convection obtains. Our results indicate that a positive lepton gradient forms in the outer core. In addition, we show that heating always accompanies deleptonization. In pure diffusion models most of the heat is deposited in the outer core, and in convective models most of the heat is deposited in the inner core. In all cases, the increase in the pressure due to heating is insufficient to counter the decrease int e pressure due to the loss of lepton degeneracy pressure, and the core contracts. However, the heating of the shocked mantle by the core is likely to cause it to expand on diffusion time scales. Since a lot of energy (>10/sup 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.
Educational Use Research
Learning Resource Type Article
Publisher Date 1981-12-01
Publisher Department Department of Physics, State University of New York at Stony Brook
Publisher Place United States
Journal Astrophys. J.
Volume Number 251
Issue Number 1
Organization Department of Physics, State University of New York at Stony Brook


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