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Abstract: A wide variety of transient events in the solar corona seem to requireexplanations that invoke fast reconnection. Theoretical models explaining fastreconnection often rely on enhanced resistivity. We start with data derivedfrom observed reconnection rates in solar flares and seek to reconcile themwith the chaos-induced resistivity model of Numata and Yoshida 2002 and withresistivity arising out of the kinetic Alfv\-en wave KAW instability. We findthat the resistivities arising from either of these mechanisms, when localizedover lengthscales of the order of an ion skin depth, are capable of explainingthe observationally mandated Lundquist numbers.



Autor: K. A. P. Singh, Prasad Subramanian

Fuente: https://arxiv.org/







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