Physical processes in photon-starved nonthermal pair plasmas

Details Physical processes in photon-starved nonthermal pair plasmas Physical processes in photon-starved nonthermal pair plasmas

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...357..149z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 357, July 1, 1990, p. 149-160.

Astronomy and Astrophysics

Astrophysics

43

Compton Effect, Electron-Positron Pairs, Gamma Ray Bursts, Photon-Electron Interaction, Relativistic Plasmas, Active Galactic Nuclei, Coulomb Collisions, Energy Transfer, Optical Thickness

Scientific paper

Compton spectra produced by relativistic, unmagnetized, nonthermal electron-positron pairs injected into 'photon-starved' plasmas, where the luminosity in soft photons is much less than the power in the nonthermal pair injection, are studied. The overall form of the spectra consists of a rising spectrum at low energies, a single or double peak in the 0.1-1 MeV energy range, a cutoff above the peak, and a gamma-ray tail with a varying slope depending on the plasma parameters. The low-energy power law is mostly due to the primary soft photons being repeatedly upscattered by the hot thermal electrons. Comparisons are made with observations of compact objects.

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