What can we infer about the underlying physics from burst distributions observed in an RMHD simulation ?

Details What can we infer about the underlying physics from burst distributions observed in an RMHD simulation ? What can we infer about the underlying physics from burst distributions observed in an RMHD simulation ?

2000-11-20

arxiv.org/abs/astro-ph/0011358v2

Planetary and Space Science, 49, 1233-1237 (2001)

Astronomy and Astrophysics

Astrophysics

In press, Planetary and Space Science. Proceedings of a session at European Geophysical Society General Assembly, Nice, 2000

Scientific paper

10.1016/S0032-0633(01)00064-2

We determine that the sizes of bursts in mean-square current density in a reduced magnetohydrodynamic (RMHD)simulation follow power-law probability density function (PDF). The PDFs for burst durations and waiting time between bursts are clearly not exponential and could also be power-law. This suffices to distinguish their behaviour from the original Bak et al. sandpile model which had exponential waiting time PDFs. However, it is not sufficient to distinguish between turbulence, some other SOC-like models, and other red noise sources.

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