Episodic footpoint heating of coronal loops: does it work?

Details Episodic footpoint heating of coronal loops: does it work? Episodic footpoint heating of coronal loops: does it work?

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..697m&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

Coronal Heating, Coronal Loops, Transition Region, Hydrodynamics

Scientific paper

Short answer: YES! And in mor details..: Coronal loop temperatures are known to be of a few millions degrees but the nature of the energy source remains as a longstanding fundamental problem for solar and stellar physics. Observations of solar chromosphere-corona transition region plasma show evidence of small, short-lived dynamic phenomena called e.g., explosive events, blinkers, micro-flares and nano-flares. These events may serve as the basic building blocks of the heating mechanism(s) of the solar atmosphere. In this paper, we study the heating of the solar corona by numerous micro-scale randomly localized events representing the energy dissipation found by observations. It is found that these energy input distributions can maintain the plasma along the loop at typical coronal temperatures. We also found, that typical loop temperature structures seen by e.g. Trace are recovered when the energy release occurs close to the foot points of the loop. Implications of these results upon the lastest coronal loop observations are addressed.

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