Statistics – Computation
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...372..225h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 372, May 1, 1991, p. 225-240. Research supported by Universidad Nacional Au
Statistics
Computation
8
Boltzmann Transport Equation, Computational Astrophysics, Einstein Equations, Elementary Particle Interactions, Particle Mass, Bosons, Emission Spectra, Fermions, Gravitational Effects, Hydrodynamic Equations, Neutron Stars, Stellar Models
Scientific paper
The ADM formalism of general relativity is applied to write the Einstein and matter equations for a spherically symmetric spacetime whose gravitational sources are taken to be represented by ordinary matter, described by a perfect fluid approximation, and either massless or massive weakly interacting particles, for which a kinetic-theory description is employed. The Boltzmann equation, which is solved directly, is written in a form which is particularly amenable to numerical treatment, and for which massive particles can be accommodated as easily as massless ones. Some of the numerical methods used to solve these equations are described and the results of several code tests are discussed. The behavior of massive and massless particles is compared, and results are presented from a code for the cooling of a crude model of a 'neutron star' by emission of massive particles.
Harleston Hugh
Holcomb Katherine Ann
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