Self-Organized Criticality in Compact Plasmas

Details Self-Organized Criticality in Compact Plasmas Self-Organized Criticality in Compact Plasmas

1998-01-19

arxiv.org/abs/astro-ph/9801182v4

Astronomy and Astrophysics

Astrophysics

9 pages, 5 figures, AASTeX, Submitted to ApJL

Scientific paper

10.1086/311516

Compact plasmas, that exist near black-hole candidates and in gamma ray burst sources, commonly exhibit self-organized non-linear behavior. A model that simulates the non-linear behavior of compact radiative plasmas is constructed directly from the observed luminosity and variability. The simulation shows that such plasmas self organize, and that the degree of non-linearity as well as the slope of the power density spectrum increase with compactness. The simulation is based on a cellular automaton table that includes the properties of the hot (relativistic) plasmas, and the magnitude of the energy perturbations. The plasmas cool or heat up, depending on whether they release more or less than the energy of a single perturbation. The energy release depends on the plasmas densities and temperatures, and the perturbations energy. Strong perturbations may cool the previously heated plasma through shocks and/or pair creation. New observations of some active galactic nuclei and gamma ray bursters are consistent with the simulation

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