Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..695b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Oct. 1, 1987, p. 695-712.
Astronomy and Astrophysics
Astronomy
10
Cooling, Relativistic Particles, Relativistic Plasmas, Space Plasmas, Active Galactic Nuclei, Annihilation Reactions, Bremsstrahlung, Compton Effect, Particle Collisions, Synchrotron Radiation
Scientific paper
The maintenance of the population in the Maxwellian tail of a relativistic thermal pair plasma by binary collisions is investigated, and the effect of perturbations on the tail of the distribution due to cooling by bremsstrahlung, inverse Compton scattering of soft photons, synchrotron emission, and pair annihilation is considered. A comparison is made between the spectral time-scales for two-body thermalization and cooling at different pair energies, and it is found that the formation of the thermal tail is suppressed under certain conditions that are established, and that correspond to very efficient cooling. The loss of the tail would then lead to the loss of the higher energy component of X-ray and gamma-ray emission in thermal models for compact objects such as gamma-ray burst sources and active galactic nuclei.
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