Multiwavelength observations of the impulsive flare of November 19, 1990

Details Multiwavelength observations of the impulsive flare of November 19, 1990 Multiwavelength observations of the impulsive flare of November 19, 1990

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..149..155h&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 149, no. 1, p. 155-170

Astronomy and Astrophysics

Astronomy

2

Correlation, Evolution (Development), H Alpha Line, Microwave Spectra, Position (Location), Radio Astronomy, Solar Flares, Solar Radio Bursts, Brightness, Electron Beams, Polarization, Radio Antennas, Spectrograms, Spectrographs

Scientific paper

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-alpha imaging spectrograms. The event of November 19, 1990 showed 4 impulsive peaks in microwaves and 2 H-alpha 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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