Computer Science
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aipc...77..231r&link_type=abstract
AIP Conference Proceedings, Volume 77, pp. 231-240 (1982).
Computer Science
Radiation Mechanisms, Polarization, Magnetohydrodynamics And Plasmas, Elementary Particle Processes, X-Ray Sources, X-Ray Bursts
Scientific paper
The theory of photon emission, absorption and scattering in a relativistic plasma of positrons, electrons and photons is studied. Expressions for the emissivities and absorption coefficients of pair annihilation, pair production and Compton scattering are given and evaluated numerically. The conditions for negative absorption are investigated. In system of photons and e+-e- pairs, and emission line at ~0.43 MeV can be produced by grasar action provided that the pair chemical potential exceeds ~1 MeV. At a temperature of ~109K this requires a pair density >~1030cm-3, a value much larger than the thermodynamic equilibrium pair density at this temperature. This mechanism could account without a gravitational redshift for the observed lines at this energy from gamma ray bursts.
Jones Frank C.
McKinley Jennifer M.
Ramaty Reuven
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