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Astron. Astrophys. 324, 11-14 (1997)
Heating of coronal loops by phase-mixing
A.W. Hood 1,
D. González-Delgado 2 and
J. Ireland 1
1 Department of Mathematical and Computational Sciences,
University of St Andrews, St Andrews, KY16 9SS, UK
2 Instituto de Astrofisica de Canarias, C/ Via Lactea s/n,
E-38200 La Laguna, Tenerife, Spain
Received 25 October 1996 / Accepted 27 January 1997
Abstract
A simple, self similar solution for the heating of coronal loops is presented. It is shown that the Heyvaerts-Priest model gives a good description of phase mixing in a certain class of coronal loops. In addition, under typical coronal conditions the ohmic heating, due to phase mixing, can provide magnetic energy on a timescale comparable with the coronal radiative time. Thus, it is possible that phase mixing can maintain a hot coronal loop for large Lundquist number. If the photospheric motions continually excite coronal loops, then phase mixing could contribute to a background level of coronal heating for very large Lundquist number.
Key words: MHD 
Sun: corona
Send offprint requests to: A. W. Hood
Contents
- 1. Introduction
- 2. Basic equations and loop models
- 3. Self-similar solution
- 4. Discussion
- References
© European Southern Observatory (ESO) 1997
Online publication: May 26, 1998
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