An Evaluation of Possible Mechanisms for Anomalous Resistivity in the Solar Corona |
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Authors: | K A P Singh Prasad Subramanian |
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Institution: | (1) Department of Applied Physics, Institute of Technology, Banaras Hindu University, Varanasi, 221005, India;(2) Indian Institute of Astrophysics, Bangalore, 560034, India |
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Abstract: | A wide variety of transient events in the solar corona seem to require explanations that invoke fast reconnection. Theoretical
models explaining fast reconnection often rely on enhanced resistivity. We start with data derived from observed reconnection
rates in solar flares and seek to reconcile them with the chaos-induced resistivity model of Numata and Yoshida (Phys. Rev. Lett.
88, 045003, 2002) and with resistivity arising out of the kinetic Alfvén wave (KAW) instability. We find that the resistivities arising from
either of these mechanisms, when localized over length scales of the order of an ion skin depth, are capable of explaining
the observationally mandated Lundquist numbers. |
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Keywords: | |
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