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Particle dynamics in a non-flaring solar active region model

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Threlfall_2016_AANDA_A4.pdf (7.558Mb)
Date
03/2016
Author
Threlfall, J.
-A. Bourdin, Ph.
Neukirch, T.
E. Parnell, C.
Keywords
Plasmas
Sun: corona
Sun: magnetic fields
Sun: activity
Acceleration of particles
QB Astronomy
QC Physics
3rd-NDAS
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Abstract
The aim of this work is to investigate and characterise particle behaviour in a (observationally-driven) 3D MHD model of the solar atmosphere above a slowly evolving, non-flaring active region. We use a relativistic guiding-centre particle code to investigate particle acceleration in a single snapshot of the 3D MHD simulation. Despite the lack of flare-like behaviour in the active region, direct acceleration of electrons and protons to non-thermal energies (≲ 42 MeV) was found, yielding spectra with high-energy tails which conform to a power law. Examples of particle dynamics, including particle trapping caused by local electric rather than magnetic field effects, are observed and discussed, together with implications for future experiments which simulate non-flaring active region heating and reconnection.
Citation
Threlfall , J , -A. Bourdin , P , Neukirch , T & E. Parnell , C 2016 , ' Particle dynamics in a non-flaring solar active region model ' , Astronomy & Astrophysics , vol. 587 , A4 . https://doi.org/10.1051/0004-6361/201526657
Publication
Astronomy & Astrophysics
Status
Peer reviewed
DOI
https://doi.org/10.1051/0004-6361/201526657
ISSN
0004-6361
Type
Journal article
Rights
© 2016, Publisher / the Author(s). This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at www.aanda.org / https://dx.doi.org/10.1051/0004-6361/201526657
Collections
  • University of St Andrews Research
URL
http://arxiv.org/pdf/1510.04211v2.pdf
URI
http://hdl.handle.net/10023/8203

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