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Modelling the global solar corona III: Origin of the hemispheric pattern of filaments

Yeates, A.R.; Mackay, D.H.


D.H. Mackay


We consider the physical origin of the hemispheric pattern of filament chirality on the Sun. Our 3D simulations of the coronal field evolution over a period of six months, based on photospheric magnetic measurements, were previously shown to be highly successful at reproducing observed filament chiralities. In this paper we identify and describe the physical mechanisms responsible for this success. The key mechanisms are found to be (1) differential rotation of north – south polarity inversion lines, (2) the shape of bipolar active regions, and (3) evolution of skew over a period of many days. As on the real Sun, the hemispheric pattern in our simulations holds in a statistical sense. Exceptions arise naturally for filaments in certain locations relative to bipolar active regions or from interactions among a number of active regions.


Yeates, A., & Mackay, D. (2009). Modelling the global solar corona III: Origin of the hemispheric pattern of filaments. Solar Physics, 254(1), 77-88.

Journal Article Type Article
Acceptance Date Sep 26, 2008
Publication Date Jan 1, 2009
Deposit Date Oct 14, 2011
Publicly Available Date Apr 30, 2015
Journal Solar Physics
Print ISSN 0038-0938
Electronic ISSN 1573-093X
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 254
Issue 1
Pages 77-88
Keywords Magnetic fields: Corona, Prominences: Magnetic field, Helicity: Magnetic.


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