Distribution Functions of Sizes and Fluxes Determined from Supra-Arcade Downflows

Details Distribution Functions of Sizes and Fluxes Determined from Supra-Arcade Downflows Distribution Functions of Sizes and Fluxes Determined from Supra-Arcade Downflows

2011-06-22

arxiv.org/abs/1106.4567v1

Astrophysical Journal Letters (2011), 735, L6

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Published in ApJL

Scientific paper

10.1088/2041-8205/735/1/L6

The frequency distributions of sizes and fluxes of supra-arcade downflows (SADs) provide information about the process of their creation. For example, a fractal creation process may be expected to yield a power-law distribution of sizes and/or fluxes. We examine 120 cross-sectional areas and magnetic flux estimates found by Savage & McKenzie for SADs, and find that (1) the areas are consistent with a log-normal distribution and (2) the fluxes are consistent with both a log-normal and an exponential distribution. Neither set of measurements is compatible with a power-law distribution nor a normal distribution. As a demonstration of the applicability of these findings to improved understanding of reconnection, we consider a simple SAD growth scenario with minimal assumptions, capable of producing a log-normal distribution.

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