The radio brightness of the undisturbed outer solar corona in the presence of a radial magnetic field

Abstract

The radio brightness of the quiet outer solar corona at a frequency of 35 MHz in the presence of a radial magnetic field is computed. It is found that the brightness temperature of the ordinary radiation increases significantly. It is also found that in the presence of a radial magnetic field, coronal holes will appear as bright emission regions on the disk and as depressions at the limb.