Heating of coronal arcade by a slow motion of its footpoints

Details Heating of coronal arcade by a slow motion of its footpoints Heating of coronal arcade by a slow motion of its footpoints

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988cha%26a..12..311p&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 12, Issue 4, p. 311-319.

Astronomy and Astrophysics

Astrophysics

Sun, Evolution Of Magnetic Field, Heating Of Corona

Scientific paper

In their ``mixing time'' theory of magnetic heating of the corona by slow photospheric motion, Heyvaerts and Priest (1984) neglected certain second-order terms in the calculation of the energy and retained the linear part of the perturbed magnetic field which led to infinite displacements. In this paper, we revised these points. Our main results are: (1) the heating efficiency we obtained is greater than what they found. (2) Dissipation-free, linear evolution of the force-free field of coronal arcade is impossible. (3) The possibility of reconnection of field lines of non-linear force-free field is clarified in terms of the field configuration and it is pointed out that reconnection is most likely at a height equal to about one width of the arcade.

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