The emergence of braided magnetic fields

Prior, C. and MacTaggart, D. (2016) The emergence of braided magnetic fields. Geophysical and Astrophysical Fluid Dynamics, 110(5), pp. 432-457. (doi:10.1080/03091929.2016.1216552)

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Abstract

We study the emergence of braided magnetic fields from the top of the solar interior through to the corona. It is widely believed that emerging regions smaller than active regions are formed in the upper convection zone near the photosphere. Here, bundles of braided, rather than twisted, magnetic field can be formed, which then rise upward to emerge into the atmosphere. To test this theory, we investigate the behaviour of braided magnetic fields as they emerge into the solar atmosphere. We compare and contrast our models to previous studies of twisted flux tube emergence and discuss results that can be tested observationally. Although this is just an initial study, our results suggest that the underlying magnetic field structure of small emerging regions need not be twisted and that braided field, formed in the convection zone, could suffice.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Mactaggart, Dr David
Authors: Prior, C., and MacTaggart, D.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Geophysical and Astrophysical Fluid Dynamics
Publisher:Taylor and Francis
ISSN:0309-1929
ISSN (Online):1026-7506
Published Online:29 July 2016
Copyright Holders:Copyright © 2016 Taylor and Francis
First Published:First published in Geophysical and Astrophysical Fluid Dynamics 110(5): 432-457
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
716211The evolution of magnetic helicity in the dynamic solar atmosphereDavid MactaggartThe Carnegie Trust for the Universities of Scotland (CARNEGIE)70323M&S - MATHEMATICS