Emission and Cooling Processes in a Hybrid Thermal-Nonthermal Plasma

Details Emission and Cooling Processes in a Hybrid Thermal-Nonthermal Plasma Emission and Cooling Processes in a Hybrid Thermal-Nonthermal Plasma

1997-11-11

arxiv.org/abs/astro-ph/9711107v1

Astronomy and Astrophysics

Astrophysics

(4 pages, 3 figures, to appear in Proceedings of the Fourth Huntsville Symposium on Gamma-Ray Bursts)

Scientific paper

10.1063/1.55296

In a hybrid thermal-nonthermal plasma, we find that the dominant emission and absorption mechanisms are synchrotron by nonthermal electrons and bremsstrahlung by thermal electrons. These two processes significantly change the spectrum from inverse Compton scatterings at low energies. We also find that Coulomb collisions are effective in cooling down the lower energy electrons but do not significantly alter the emission pattern. Compton cooling is more effective in changing emission and absorption coefficients when the photon energy density is high.

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