Comments on the heating of solar active regions by magnetic energy dissipation

Details Comments on the heating of solar active regions by magnetic energy dissipation Comments on the heating of solar active regions by magnetic energy dissipation

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.123..403c&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 123, no. 2, June 1986, p. 403, 404.

Astronomy and Astrophysics

Astrophysics

Energy Dissipation, Plasma Heating, Solar Activity, Solar Magnetic Field, Error Analysis

Scientific paper

The theoretical calculation of Kumar and Narain (1985) for the twisting velocity of the magnetic field in a solar active region is examined critically. An error in the formula used for the temperature gradient is found to give values of the turbulence factor F which are too large by the order of 7-8, leading to a twisting velocity of (about 10 to the 13th cm/s) much greater than that normally assumed (about 10,000 cm/s). From this it is inferred that Kumar and Narain's objections to the hypothesis of active-region heating by magnetic-energy dissipation are invalid.

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