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Title: Simulating the "sliding doors" effect through magnetic flux emergence
Authors: MacTaggart, David
Hood, Alan W.
Affiliation: University of Abertay Dundee. School of Computing & Engineering Systems
Keywords: Magnetohydrodynamics (MHD)
Solar photosphere
Magnetic buoyancy instability
Issue Date: Jun-2010
Publisher: American Astronomical Society/Institute of Physics
Type: Journal Article
Refereed: peer-reviewed
Rights: This is the published version of this article. Reproduced by permission of the publisher. Published version (c)American Astronomical Society/Institute of Physics, available from http://dx.doi.org/10.1088/2041-8205/716/2/L219
Citation: MacTaggart, D. and Hood, A.W. 2010. Simulating the "sliding doors" effect through magnetic flux emergence. Astrophysical Journal Letters. 716(2): pp.L219-L222. Available from http://dx.doi.org/10.1088/2041-8205/716/2/L219
Abstract: Recent Hinode photospheric vector magnetogram observations have shown that the opposite polarities of a long arcade structuremove apart and then come together. In addition to this “sliding doors” effect, orientations of horizontal magnetic fields along the polarity inversion line on the photosphere evolve from a normal-polarity configuration to an inverse one. To explain this behavior, a simple model by Okamoto et al. suggested that it is the result of the emergence of a twisted flux rope. Here, we model this scenario using a three-dimensional megnatohydrodynamic simulation of a twisted flux rope emerging into a pre-existing overlying arcade. We construct magnetograms from the simulation and compare them with the observations. The model produces the two signatures mentioned above. However, the cause of the “sliding doors” effect differs from the previous model.
URI: http://hdl.handle.net/10373/1195
ISSN: 2041-8205
Appears in Collections:Computing & Engineering Systems Collection

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