Jeffrey, N.L.S. , Fletcher, L. , Labrosse, N. and Simoes, P.J.A. (2018) The development of lower-atmosphere turbulence early in a solar flare. Science Advances, 4(12), eaav2794. (doi: 10.1126/sciadv.aav2794)
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Abstract
We present the first observational study of the onset and evolution of solar flare turbulence in the lower solar atmosphere on an unprecedented time scale of 1.7 s using the Interface Region Imaging Spectrograph observing plasma at a temperature of 80,000 K. At this time resolution, nonthermal spectral line broadening, indicating turbulent velocity fluctuations, precedes the flare onset at this temperature and is coincident with net blue-shifts. The broadening decreases as the flare brightens and then oscillates with a period of ~10 s. These observations are consistent with turbulence in the lower solar atmosphere at the flare onset, heating that region as it dissipates. This challenges the current view of energy release and transport in the standard solar flare model, suggesting that turbulence partly heats the lower atmosphere.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Simoes, Dr Paulo and Fletcher, Professor Lyndsay and Jeffrey, Dr Natasha and Labrosse, Dr Nicolas |
| Authors: | Jeffrey, N.L.S., Fletcher, L., Labrosse, N., and Simoes, P.J.A. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Science Advances |
| Publisher: | American Association for the Advancement of Science |
| ISSN: | 2375-2548 |
| ISSN (Online): | 2375-2548 |
| Copyright Holders: | Copyright © 2018 The Authors |
| First Published: | First published in Science Advances 4(12):eeav2794 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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