An Estimate of the Density and Motion of Solar Material from Observed Characteristics of Solar Radio Outbursts

Abstract

The theory of radio wave generation by multistream charge interaction (Feinstein and Sen 1951) is extended and applied to the observations made by Australian workers (Wild 1950) of the spectrum of outbursts of solar radio-frequency radiation in the frequency range 70?130 Mc/s. The dispersion equation is derived as a function of the velocity of solar material erupting into a static corona and of the temperatures and densities of the material and the corona. The application of the dispersion equation to the Australian data (loc. cit.) enables an estimate to be made of the velocity (?500 km./s.) and the particle density (?108 cm.?3) of the moving solar material.