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• W3104175087 abstract "The discrete nature of the solar magnetic field as it emerges into the corona through the photosphere indicates that it exists as isolated flux tubes in the convection zone and will remain as discrete flux tubes in the corona until it collides and reconnects with other coronal fields. Collisions of these flux tubes will in general be three-dimensional and will often lead to reconnection, both rearranging the magnetic field topology in fundamental ways and releasing magnetic energy. With the goal of better understanding these dynamics, we carry out a set of numerical experiments exploring fundamental characteristics of three-dimensional magnetic flux tube reconnection. We first show that reconnecting flux tubes at opposite extremes of twist behave very differently: in some configurations, low twist tubes slingshot while high twist tubes tunnel. We then discuss a theory explaining these differences: by assuming helicity conservation during the reconnection one can show that at high twist, tunneled tubes reach a lower magnetic energy state than slingshot tubes, whereas at low twist the opposite holds. We test three predictions made by this theory. (1) We find that the level of twist at which the transition from slingshot to tunnel occurs is about 2-3 times higher than predicted on the basis of energetics and helicity conservation alone, probably because the dynamics of the reconnection play a large role as well. (2) We find that the tunnel occurs at all flux tube collision angles predicted by the theory. (3) We find that the amount of magnetic energy a slingshot or a tunnel reconnection releases agrees reasonably well with the theory, although at the high resistivities we have to use for numerical stability, a significant amount of magnetic energy is lost to diffusion, independent of reconnection." @default.
• W3104175087 created "2020-11-23" @default.
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• W3104175087 date "2005-05-20" @default.
• W3104175087 modified "2023-10-16" @default.
• W3104175087 title "Magnetic Flux Tube Reconnection: Tunneling Versus Slingshot" @default.
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• W3104175087 doi "https://doi.org/10.1086/429585" @default.
• W3104175087 hasPublicationYear "2005" @default.
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