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)

Abstract

Aims:We investigate particle acceleration and heating in a solar microflare. <p/>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. <p/>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