Kinetics of electron-positron pair plasmas using an adaptive Monte Carlo method

Details Kinetics of electron-positron pair plasmas using an adaptive Monte Carlo method Kinetics of electron-positron pair plasmas using an adaptive Monte Carlo method

1997-02-21

arxiv.org/abs/astro-ph/9702187v1

Astronomy and Astrophysics

Astrophysics

43 pages, 7 postscript figures, to appear in the Astrophysical Journal

Scientific paper

10.1086/304534

A new algorithm for implementing the adaptive Monte Carlo method is given. It is used to solve the relativistic Boltzmann equations that describe the time evolution of a nonequilibrium electron-positron pair plasma containing high-energy photons and pairs. The collision kernels for the photons as well as pairs are constructed for Compton scattering, pair annihilation and creation, bremsstrahlung, and Bhabha & Moller scattering. For a homogeneous and isotropic plasma, analytical equilibrium solutions are obtained in terms of the initial conditions. For two non-equilibrium models, the time evolution of the photon and pair spectra is determined using the new method. The asymptotic numerical solutions are found to be in a good agreement with the analytical equilibrium states. Astrophysical applications of this scheme are discussed.

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