Solar flares,microflares, nanoflares,and coronal heating |
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Authors: | H. S. Hudson |
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Affiliation: | (1) Center for Astrophysics and Space Science, University of California, 92093 San Diego, La Jolla, CA, U.S.A. |
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Abstract: | Solar flare occurrence follows a power-law distribution against total flare energy W: dN/dW W– with an index 1.8 as determined by several studies. This implies (a) that microflares must have a different, steeper distribution if they are energetically significant, and (b) there must be a high-energy cutoff of the observed distribution. We identify the distinct soft distribution needed for coronal heating, if such a distribution exists, with Parker's nanoflares.This paper considers a microflare to be a member of the normal X-ray burst population, with comparable physical parameters except for a smaller total energy. |
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