Neutrino emission spectra of collapsing degenerate stellar cores. Calculations by the Monte Carlo method

Journal Article · Mon Mar 01 00:00:00 EST 1982 · Sov. Astron. (Engl. Transl.); (United States)

OSTI ID:6512410

Levitan, Y L; Sobol, I M; Khlopov, M Y; Chechetkin, V M

The variation of the hard part (epsilon>10 MeV) of the neutrino emission spectra of collapsing degenerate stellar cores with matter having a small optical depth to neutrions (tau< or approx. =10) is analyzed . The interaction of neutrinos with the degenerate matter is determined by processes of neutrino scattering on nuclei (without a change in neutrino energy) and neutrino scattering on degenerage electrons, in which the neutrino energy can only decrease. The neutrino emission spectrum of a collapsing stellar core in the initial stage of the onset of opacity is calculated by the Monte Carco method: A) for a central density rho/sub c/ = 10/sup 12/g/cm/sup 3/ and B) in the stage of deep collapse for rho/sub c/ = 6 x 10/sup 13/g/cm/sup 3/. In the latter case the calculation of the spectrum without allowance for effects of neutrino degeneration in the central part of the collapsing stellar core corresponds to the maximum possible suppression of the hard part of the neutrino emission spectrum.

• Research Organization: M. V. Keldysh Institute of Applied Mathematics, USSR Academy of Sciences
• OSTI ID: 6512410
• Journal Information: Sov. Astron. (Engl. Transl.); (United States), Vol. 26:2
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STARS
GRAVITATIONAL COLLAPSE
NEUTRINOS
EMISSION SPECTRA
MONTE CARLO METHOD
STAR MODELS
VARIATIONS
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
SPECTRA
640102* - Astrophysics &amp; Cosmology- Stars &amp; Quasi-Stellar
Radio &amp; X-Ray Sources