Abstract April 1978 was an unusually active month with five well-defined kilometric type II radio bursts observed by the radio astronomy experiment on the Voyager spacecraft. An analysis has been made of these kilometric radio events and their associated interplanetary shocks. The apparent speed of each of the shocks was determined from the average frequency drift rate of the kilometric type II burst by employing the hypothesis that the radiation was emitted at the local plasma frequency. This analysis suggests that the Type II radiation is plasma emission at the fundamental with the most intense Type II emission emanating from local dense structures in the interplanetary medium. We further show that sudden changes in the frequency drift rate can be explained by assuming that the shock propagates into a region with a different density gradient.
Kilometric type II radiation from interplanetary shocks: Interpretation of voyager results
Advances in Space Research ; 6 , 1 ; 385-388
01.01.1986
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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