Self-Organized Criticality in Solar Physics and Astrophysics

Details Self-Organized Criticality in Solar Physics and Astrophysics Self-Organized Criticality in Solar Physics and Astrophysics

2010-02-27

arxiv.org/abs/1003.0122v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

12 pages, 9 Figs, submitted to .Journal of Applied Functional Analysis, Proc. of 3rd Internat. Interdisciplinary Symposium on

Scientific paper

The concept of "self-organized criticality" (SOC) has been introduced by Bak, Tang, and Wiesenfeld (1987) to describe the statistics of avalanches on the surface of a sandpile with a critical slope, which produces a scale-free powerlaw size distribution of avalanches. In the meantime, SOC behavior has been identified in many nonlinear dissipative systems that are driven to a critical state. On a most general level, SOC is the statistics of coherent nonlinear processes, in contrast to the Poisson statistics of incoherent random processes. The SOC concept has been applied to laboratory experiments (of rice or sand piles), to human activities (population growth, language, economy, traffic jams, wars), to biophysics, geophysics (earthquakes, landslides, forest fires), magnetospheric physics, solar physics (flares), stellar physics (flares, cataclysmic variables, accretion disks, black holes, pulsar glitches, gamma ray bursts), and to galactic physics and cosmology.

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