A viable mechanism to establish relativistic thermal particle distribution functions in cosmic sources

Details A viable mechanism to establish relativistic thermal particle distribution functions in cosmic sources A viable mechanism to establish relativistic thermal particle distribution functions in cosmic sources

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...143..431s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 143, no. 2, Feb. 1985, p. 431-434. Sponsorship: Deutsche Forschungsgemeinschaf

Astronomy and Astrophysics

Astrophysics

34

Fermi Surfaces, Galactic Nuclei, Gamma Ray Bursts, Maxwell-Boltzmann Density Function, Relativistic Electron Beams, Thermal Plasmas, Active Galactic Nuclei, Compton Effect, Distribution Functions, Electron-Positron Plasmas, Inverse Scattering, Particle Acceleration, Steady State, Synchrotron Radiation, Time Dependence

Scientific paper

A combination of first and second order Fermi acceleration (A) and synchrotron and inverse Compton radiation losses is analytically shown sufficient to model the Maxwellian distributions of emissions from several energetic cosmic events. The model is targeted at the proposed thermal relativistic electron-positron plasmas of gamma-ray bursts, accreting magnetic degenerate dwarfs and active galactic nuclei. Expresssions are defined for the momentum spectrum of particles experiencing FA in an irregularly moving magnetic fluid. Account is also taken of other acceleration mechanisms and it is found that the competing energy gain and loss forces acting on the particles will produce a modified Maxwell-Boltzmann distribution. A steady-state solution requires a positive momentum gradient in a specified interval which can be associated with Langmuir resonant wave heating of the medium to explosive levels. The resulting instabilities may be strong enough to trigger the observed high energies.

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