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Microflares and the Statistics of X-ray Flares View all abstracts by submitter

Amir Caspi   Submitted: 2011-10-28 12:21

This review surveys the statistics of solar X-ray flares, emphasising the newviews that RHESSI has given us of the weaker events (the microflares). The newdata reveal that these microflares strongly resemble more energetic events inmost respects; they occur solely within active regions and exhibithigh-temperature/nonthermal emissions in approximately the same proportion asmajor events. We discuss the distributions of flare parameters (e.g., peakflux) and how these parameters correlate, for instance via the Neupert effect.We also highlight the systematic biases involved in intercomparing datarepresenting many decades of event magnitude. The intermittency of theflare/microflare occurrence, both in space and in time, argues that thesediscrete events do not explain general coronal heating, either in activeregions or in the quiet Sun.

Authors: I. G. Hannah, H. S. Hudson, M. Battaglia, S. Christe, J. Kasparova, S. Krucker, M. R. Kundu, A. Veronig
Projects: GONG,Hinode/EIS,Hinode/SOT,Hinode/XRT,Nobeyama Radioheliograph,Owens Valley Solar Array,RHESSI,SDO-AIA,SDO-HMI,SDO-EVE,SoHO-EIT,SoHO-MDI,SoHO-CDS,SoHO-LASCO,SoHO-SUMER,STEREO,TRACE

Publication Status: Published -- Hannah, I. G., et al. 2011, Space Sci. Rev., 159, 263; DOI 10.1007/s11214-010-9705-4
Last Modified: 2011-11-17 14:20
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