James, T., Subramanian, P. and Kontar, E. P. (2017) Small electron acceleration episodes in the solar corona. Monthly Notices of the Royal Astronomical Society, 471(1), pp. 89-99. (doi: 10.1093/mnras/stx1460)
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Abstract
We study the energetics of non-thermal electrons produced in small acceleration episodes in the solar corona. We carried out an extensive survey spanning 2004–2015 and shortlisted six impulsive electron events detected at 1 au that were not associated with large solar flares (GOES soft X-ray class > C1) or with coronal mass ejections. Each of these events had weak, but detectable hard X-ray (HXR) emission near the west limb, and were associated with interplanetary type III bursts. In some respects, these events seem like weak counterparts of ‘cold/tenuous’ flares. The energy carried by the HXR producing electron population was ≈1023–1025 erg, while that in the corresponding population detected at 1 au was ≈1024– 1025 erg. The number of electrons that escape the coronal acceleration site and reach 1 au constitute 6 per cent to 148 per cent of those that precipitate downwards to produce thick target HXR emission.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Kontar, Professor Eduard |
| Authors: | James, T., Subramanian, P., and Kontar, E. P. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Monthly Notices of the Royal Astronomical Society |
| Publisher: | Oxford University Press |
| ISSN: | 0035-8711 |
| ISSN (Online): | 1365-2966 |
| Published Online: | 12 June 2017 |
| Copyright Holders: | Copyright © 2017 The Authors |
| First Published: | First published in Monthly Notices of the Royal Astronomical Society 471(1): 89-99 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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