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On the Thermalisation of Flare-Time Energetic Electrons Observed at Radio and X-Ray Wavelengths

Published online by Cambridge University Press:  14 August 2015

S. S. Degaonkar ,
H. S. Sawant  and
R. V. Bhonsle
S. S. Degaonkar
Affiliation:
Physical Research Laboratory Ahmedabad-380 009, India
H. S. Sawant
Affiliation:
Physical Research Laboratory Ahmedabad-380 009, India
R. V. Bhonsle
Affiliation:
Physical Research Laboratory Ahmedabad-380 009, India

Abstract

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An interesting microwave event at 2800 MHz was recorded at Ahmedabad on September 19, 1977 at 1026 UT at the same time as the H-Alpha solar flare of importance 3B. The microwave burst was of impulsive nature, with as many as twenty impulses in seventy minutes with a quasi-periodicity of 1 to 5 minutes. An X-ray burst recorded by GOES Satellite in 1-8A band showed at the same time a smooth soft X-ray profile with apparently no sign of hard X-ray bursts. This indicates that the acceleration of discrete electron streams which produced impulsive microwave bursts was not sufficient to produce the hard X-ray component but got thermalised to produce soft X-ray emission, with a gradual rise and a slow decay covering a long duration of more than 2 1/2 hours.

Type
Part III. Solar Transient Phenomena Affecting the Corona and Interplanetary Medium: Dynamics Deduced from Observations
Information
Symposium - International Astronomical Union , Volume 91: Solar and Interplanetary Dynamics , 1980 , pp. 223 - 226
Copyright
Copyright © Reidel 1980 

References

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