A topological analysis of the magnetic breakout model for an eruptive solar flare

Details A topological analysis of the magnetic breakout model for an eruptive solar flare A topological analysis of the magnetic breakout model for an eruptive solar flare

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005rspsa.461.2099m&link_type=abstract

Royal Society of London Proceedings Series A, vol. 461, Issue 2059, p.2099-2120

Mathematics

Logic

9

Solar Flare, Magnetic Breakout, Magnetic Topology, Solar Corona

Scientific paper

The magnetic breakout model gives an elegant explanation for the onset of an eruptive solar flare, involving magnetic reconnection at a coronal null point which leads to the initially enclosed flux ‘breaking out’ to large distances. In this paper we take a topological approach to the study of the conditions required for this breakout phenomenon to occur. The evolution of a simple delta sunspot model, up to the point of breakout, is analysed through several sequences of potential and linear force-free quasi-static equilibria. We show that any new class of field lines, such as those connecting to large distances, must be created through a global topological bifurcation and derive rules to predict the topological reconfiguration due to various types of bifurcation.

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