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 1985 May - September. 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.