Malcolm Druett
Beam electrons as a source of Hα flare ribbons
Druett, Malcolm; Scullion, Eamon; Zharkova, Valentina; Matthews, Sarah; Zharkov, Sergei; Rouppe Van der Voort, Luc
Authors
Eamon Scullion
Valentina Zharkova
Sarah Matthews
Dr Serhii Zharkov S.Zharkov@hull.ac.uk
Lecturer in Physics
Luc Rouppe Van der Voort
Abstract
The observations of solar flare onsets show rapid increase of hard and soft X-rays, ultra-violet emission with large Doppler blue shifts associated with plasma upflows, and Hα hydrogen emission with red shifts up to 1–4 Å. Modern radiative hydrodynamic models account well for blue-shifted emission, but struggle to reproduce closely the red-shifted Hα lines. Here we present a joint hydrodynamic and radiative model showing that during the first seconds of beam injection the effects caused by beam electrons can reproduce Hα line profiles with large red-shifts closely matching those observed in a C1.5 flare by the Swedish Solar Telescope. The model also accounts closely for timing and magnitude of upward motion to the corona observed 29 s after the event onset in 171 Å by the Atmospheric Imaging Assembly/Solar Dynamics Observatory.
Citation
Druett, M., Scullion, E., Zharkova, V., Matthews, S., Zharkov, S., & Rouppe Van der Voort, L. (2017). Beam electrons as a source of Hα flare ribbons. Nature communications, 8, 13. https://doi.org/10.1038/ncomms15905
Journal Article Type | Article |
---|---|
Acceptance Date | May 12, 2017 |
Online Publication Date | Jun 27, 2017 |
Publication Date | Jun 27, 2017 |
Deposit Date | Mar 8, 2018 |
Publicly Available Date | Mar 29, 2024 |
Journal | Nature Communications |
Electronic ISSN | 2041-1723 |
Publisher | Nature Publishing Group |
Peer Reviewed | Peer Reviewed |
Volume | 8 |
Article Number | 15905 |
Pages | 13 |
DOI | https://doi.org/10.1038/ncomms15905 |
Keywords | General biochemistry; Genetics and molecular biology; General physics and astronomy; General chemistry |
Public URL | https://hull-repository.worktribe.com/output/724344 |
Publisher URL | https://www.nature.com/articles/ncomms15905 |
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