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.
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Subramanian, K.R., Sastry, C.V. The low-frequency radio spectrum of the continuum emission from the undisturbed sun. J Astrophys Astron 9, 225–229 (1988). https://doi.org/10.1007/BF02715067
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DOI: https://doi.org/10.1007/BF02715067