Abstract
In the present paper we report the results of a correlation analysis for 57 microwave impulsive bursts observed at six frequencies in which we have obtained a regression line between the peak frequency and the corresponding rise time of microwave impulsive bursts: {ie361-01} (with a correlation coefficient of - 0.43). This can be explained in the frame of a thermal model. The magnetic field decrease with height has to be much slower than in a dipole field in order to explain the weak dependence of f p on t r . This decrease of magnetic field with height in burst sources is based on the relationship between f p and t r found by assuming a thermal flare model with a collisionless conduction front.
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On leave from Beijing Observatory, Academia Sinica, Beijing, China.
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Ren-Yang, Z., Magun, A. & Schanda, E. On the relation between the peak frequency and the corresponding rise time of solar microwave impulsive bursts and the height dependence of magnetic fields. Sol Phys 130, 361–368 (1990). https://doi.org/10.1007/BF00156799
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DOI: https://doi.org/10.1007/BF00156799