Emerging Flux and the Heating of Coronal Loops

Details Emerging Flux and the Heating of Coronal Loops Emerging Flux and the Heating of Coronal Loops

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..219..483s&link_type=abstract

Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We suggest that coronal loop heating is caused by dissipation of magnetic energy as new magnetic flux emerges from the photosphere. Based on data from a multi wavelength campaign of observations during the flight of the Flare Genesis Experiment we describe how emergence of flux from the photosphere appears directly to heat the corona to 2-3 MK. Following intense heating the loops cool and become visible through the filters of the TRACE (Transition Region and Coronal Explorer)instrument at one million degrees. We determine the relaxation time of the cooling and compare it withtheoretical heating functions. The proposed mechanism is well accepted in flare loops but we suggest that the mechanism is generally valid and helps to explain the visibility of active region loops in transition region lines.

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