An intriguing solar microflare observed with RHESSI, Hinode, and TRACE

Hannah, I.G. , Krucker, S., Hudson, H.S., Christe, S. and Lin, R.P. (2008) An intriguing solar microflare observed with RHESSI, Hinode, and TRACE. Astronomy and Astrophysics, 481(1), L45-L48. (doi:10.1051/0004-6361:20079019)

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Abstract

Aims:We investigate particle acceleration and heating in a solar microflare.

Methods: In a microflare with non-thermal emission to remarkably high energies (\gt50 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.

Item Type:Articles (Letter)
Keywords:Sun: corona, Sun: flares, Sun: X-rays, gamma rays
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hannah, Dr Iain
Authors: Hannah, I.G., Krucker, S., Hudson, H.S., Christe, S., and Lin, R.P.
Subjects:Q Science > QB Astronomy
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Astronomy and Astrophysics
Publisher:EDP Sciences
ISSN:0004-6361
ISSN (Online):1432-0746
Published Online:04 December 2007

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