Multiwavelength observations of the impulsive flare of November 19, 1990 |
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| Authors: | R Herrmann E Rolli E Correia J E R Costa |
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| Institution: | (1) Institute of Applies Physics, University of Bern, Bern, Switzerland;(2) Centro de Rádio-Astronomia e Aplicações Espaciais, São Paulo, Brasil |
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| Abstract: | We present the observation and interpretation of a solar radio burst whose evolution of the source position at 48 GHz has been correlated with microwave spectral observations from 3.1 to 19.6 GHz and H imaging spectrograms. The event of November 19, 1990 showed 4 impulsive peaks in microwaves and 2 H kernels. There exists strong evidence that the impulsive emission has originated from nonthermal electrons including an electron beam during the rising phase of the third microwave peak. The complex evolution of the source position at 48 GHz is attributed to two inhomogeneous and spatially separated sources with changing relative brightness. |
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