Solar flare hard X-ray spectra possibly inconsistent with the collisional thick target model

Kontar, E.P. and Brown, J.C. (2006) Solar flare hard X-ray spectra possibly inconsistent with the collisional thick target model. Advances in Space Research, 38(5), pp. 945-950. (doi:10.1016/j.asr.2005.09.029)

Kontar, E.P. and Brown, J.C. (2006) Solar flare hard X-ray spectra possibly inconsistent with the collisional thick target model. Advances in Space Research, 38(5), pp. 945-950. (doi:10.1016/j.asr.2005.09.029)

Full text not currently available from Enlighten.

Abstract

Recent progress in solar hard X-ray (HXR) observations with RHESSI data and methods for spectral inversion allow us to study model-independent mean electron flux spectra in solar flares. We report several hard X-ray events observed by RHESSI in which the photon spectra I(ϵ) are such that the inferred source mean electron spectra are not consistent with the standard model of collisional transport in solar flares. The observed photon spectra are so flat locally that the recovered mean electron flux spectra show a dip around 17–31 keV. While we note that alternative explanations, unrelated to electron transport, have not been ruled out, we focus on the physical implications of this tentative result for the collisional thick target model.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Kontar, Dr Eduard and Brown, Professor John
Authors: Kontar, E.P., and Brown, J.C.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Advances in Space Research
ISSN:02731177
Published Online:08 November 2005
Related URLs:

University Staff: Request a correction | Enlighten Editors: Update this record