A&A 481, L45-L48 (2008)
An intriguing solar microflare observed with RHESSI, Hinode, and TRACEI. G. Hannah1, S. Krucker1, H. S. Hudson1, S. Christe1, 2, and R. P. Lin1, 2
1 Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, 94720-7450, USA
2 Physics Department, University of California at Berkeley, Berkeley, CA, 94720-7450, USA
(Received 8 November 2007 / Accepted 3 December 2007)
Aims.We investigate particle acceleration and heating in a solar microflare.
Methods.In a microflare with non-thermal emission to remarkably high energies (>50 keV), we investigate the hard X-rays with RHESSI imaging and spectroscopy and the resulting thermal emission seen in soft X-rays with Hinode/XRT and in EUV with TRACE.
Results.The non-thermal footpoints observed with RHESSI spatially and temporally match bright footpoint emission in soft X-rays and EUV. There is the possibility that the non-thermal spectrum extends down to 4 keV. The hard X-ray burst clearly does not follow the expected Neupert effect, with the time integrated hard X-rays not matching the soft X-ray time profile. So, although this is a simple microflare with good X-ray observation coverage it does not fit the standard flare model.
Key words: Sun: corona -- Sun: flares -- Sun: X-rays, gamma rays
© ESO 2008