Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.194.1033b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 194, Mar. 1981, p. 1033-1039, 1041-1055.
Astronomy and Astrophysics
Astronomy
80
Compton Effect, Fluid Flow, High Temperature Plasmas, Space Plasmas, Transfer Functions, Approximation, Background Radiation, Electron Plasma, Microwaves, Optical Thickness, Particle Diffusion, Photons, Quasars, Random Processes, Shock Waves, Temperature Effects
Scientific paper
The transfer equation describing Compton scattering in an optically thick converging fluid flow is derived under the diffusive approximation and applied to a radiation-dominated shock. For the case of a fully ionized, nonrelativistic plasma, the transfer equation obeyed by the photon occupation number is obtained and used to derive conditions for the dominance of bulk photon acceleration over thermal Comptonization. Analysis of Compton scattering in a radiation-dominated, plane-parallel shock with photon to electron ratio greatly exceeding the proton/electron mass ratio reveals an exponentially small number of photons to be accelerated to an exponentially large energy in a converging flow, resulting in a power-law spectrum at high frequencies. The results are then applied to the cases of quasars and the origin of the microwave background.
Blandford Roger. D.
Payne David G.
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