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

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

2007-12-23

arxiv.org/abs/0712.3941v1

Phys.Rev.Lett.99:261101,2007

Astronomy and Astrophysics

Astrophysics

4 pages; Phys. Rev. Lett., in press

Scientific paper

10.1103/PhysRevLett.99.261101

I propose a new paradigm for solar coronal heating viewed as a self-regulating process keeping the plasma marginally collisionless. The mechanism is based on the coupling between two effects. First, coronal density controls the plasma collisionality and hence the transition between the slow collisional Sweet-Parker and the fast collisionless reconnection regimes. In turn, coronal energy release leads to chromospheric evaporation, increasing the density and thus inhibiting subsequent reconnection of the newly-reconnected loops. As a result, statistically, the density fluctuates around some critical level, comparable to that observed in the corona. In the long run, coronal heating can be represented by repeating cycles of fast reconnection events (nano-flares), evaporation episodes, and long periods of slow magnetic stress build-up and radiative cooling of the coronal plasma.

Affiliated with

Also associated with

No associations

Rating

Self-Regulation of Solar Coronal Heating Process via Collisionless Reconnection Condition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Self-Regulation of Solar Coronal Heating Process via Collisionless Reconnection Condition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-Regulation of Solar Coronal Heating Process via Collisionless Reconnection Condition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-36481