Self-Regulation of Solar Coronal Heating via the Collisionless Reconnection Condition

Details Self-Regulation of Solar Coronal Heating via the Collisionless Reconnection Condition Self-Regulation of Solar Coronal Heating via the Collisionless Reconnection Condition

2007-02-26

arxiv.org/abs/astro-ph/0702699v1

Mem.Soc.Ast.It., 78 (2007) 317

Astronomy and Astrophysics

Astrophysics

3 pages; Proceedings of "Coronae of Stars and Accretion Disks", Bonn, December 2006, to be published in Memorie della Societa

Scientific paper

I present a novel view on the problem of solar coronal heating. In my picture, coronal heating should be viewed as a self-regulating process that works to keep the coronal plasma marginally collisionless. The self-regulating mechanism is based on the interplay between two effects: (1) Plasma density controls coronal energy release via the transition between the slow collisional Sweet-Parker regime and the fast collisionless reconnection regime; (2) In turn, coronal energy release through reconnection leads to an increase in the ambient plasma density via chromospheric evaporation, which temporarily shuts off any subsequent reconnection involving the newly-reconnected loops.

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