19–20 May 1969, an example of type III emission during the impulsive phase of flares |
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Authors: | Joan Vorpahl |
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Affiliation: | (1) Big Bear Solar Observatory, Hale Observatories, Sacramento City College, Sacramento, Calif., U.S.A.;(2) Present address: 721 Blackmer Circle, 95825 Sacramento, Calif., U.S.A. |
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Abstract: | I examined two multiple impulsive events in May 1969 and compared their impulsive Hex, hard X-ray and microwave components to the observed type III emission. No good correlation was observed between meter intensity and the degree of simultaneous H outflow although almost every type III burst had some associated H activity. Correspondingly, an inverse relationship existed between X-ray and type III emission, i.e., a strong meter burst accompanied weak hard X-radiation. This, along with the fact that sufficient energetic electrons were normally present to produce the X-rays, implies that the trajectory, rather than electron spectrum or supply, determines whether type III noise is observed during an impulsive event. |
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