The low-frequency radio spectrum of the continuum emission from the undisturbed Sun

Abstract

The low-frequency radio spectrum of the continuum emission from the undisturbed sun is determined for 24 days during the period May-September 1985. It is found that the spectral index varied from + 1.6 to + 3.6 during this period. It is suggested that the large positive spectral indices are due to the existence of temperature gradients in the outer corona.