Heating of chromospheric magnetic features by direct current dissipation

Details Heating of chromospheric magnetic features by direct current dissipation Heating of chromospheric magnetic features by direct current dissipation

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...87...95h&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 87, Aug. 1983, p. 95-101.

Physics

8

Chromosphere, Coronal Loops, Solar Magnetic Field, Solar Temperature, Atmospheric Heating, Current Density, Ion Cyclotron Radiation, Ohmic Dissipation, Plasma Heating

Scientific paper

It is shown that the direct current dissipation is very unlikely to be the heat source of the coronal loop, because it accompanies unacceptably high heating rate in the chromospheric portion of the loop. This also suggests that a rather weak current density can supply the heat to a small (R < 107 cm) chromospheric magnetic feature. A larger magnetic element may be heated by the direct current dissipation only if the current changes directions within a single element so that the generated magnetic field is sufficiently weak to insure MHD stability.

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