Coronal energy release by MHD avalanches: continuous driving
File(s)
Published version
Author(s)
Reid, J
Hood, AW
Parnell, CE
Browning, PK
Cargill, PJ
Type
Journal Article
Abstract
Previous work has confirmed the concept of a magnetohydrodynamic (MHD) avalanche in pre-stressed threads within a coronal loop. We undertook a series of full, three-dimensional MHD simulations in order to create three threads by twisting the magnetic field through boundary motions until an instability ensues. We find that, following the original instability, one unstable thread can disrupt its neighbours with continued driving. A “bursty” heating profile results, with a series of ongoing energy releases, but no evident steady state. For the first time using full MHD, we show that avalanches are a viable mechanism for the storing and release of magnetic energy in the solar corona, as a result of photospheric motions.
Date Issued
2018-07-18
Date Acceptance
2018-03-23
Citation
Astronomy and Astrophysics: a European journal, 2018, 615, pp.1-10
ISSN
0004-6361
Publisher
EDP Sciences
Start Page
1
End Page
10
Journal / Book Title
Astronomy and Astrophysics: a European journal
Volume
615
Copyright Statement
© ESO 2018
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000439524600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Sun: corona
Sun: magnetic fields
magnetohydrodynamics (MHD)
methods: numerical
RHESSI MICROFLARE STATISTICS
SOLAR
RELAXATION
NANOFLARES
TURBULENCE
Publication Status
Published
Article Number
ARTN A84
Date Publish Online
2018-07