Fletcher, L. and Martens, P. C.H. (1998) A model for hard X-ray emission from the top of flaring loops. Astrophysical Journal, 505(1), pp. 418-431. (doi: 10.1086/306137)
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Abstract
The frequent occurrence of hard X-ray emission from the top of flaring loops was one of the discoveries by the Hard X-Ray Telescope on board the Japanese Yohkoh satellite. In this paper we take a flare current-sheet geometry and show how the combined effect of magnetic field convergence and pitch-angle scattering of nonthermal electrons injected at the top of the loop results in the generation of a looptop source with properties akin to those observed by Yohkoh. We demonstrate that a looptop source can be produced in both impulsive and gradual phase loops. We further present a possible mechanism for the generation of high-temperature "ridges" in the loop legs.
Item Type: | Articles |
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Keywords: | SUN: CORONA, SUN: FLARES, SUN: X-RAYS, GAMMA RAYS |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Fletcher, Professor Lyndsay |
Authors: | Fletcher, L., and Martens, P. C.H. |
Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Research Group: | Astronomy and Astrophysics |
Journal Name: | Astrophysical Journal |
Publisher: | American Astronomical Society |
ISSN: | 0004-637X |
ISSN (Online): | 1538-4357 |
Copyright Holders: | Copyright © 1998 The American Astronomical Society |
First Published: | First published in The Astrophysical Journal 505(1):418-431 |
Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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