Abstract
We discovered quasi-periodic oscillation characteristics of 1.4–1.6 s in the spike radiation of the typical microwave outburst observed on May 16, 1981. We analysed the observations in terms of MHD waves (‘sausage’ mode) propagating inside and outside a loop. The waves can modulate the magnetic field and the pitch angle distribution of the electron beams in the source region. These affect the growth rates of the ECM instability and so quasi-periodic oscillations in the spike radiation are generated. In addition, we estimated quantitively some relevant physical parameters.
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Zhao, RY., Jin, SZ., Fu, QJ. et al. MHD oscillations in radio spike radiation observed on May 16, 1981. Sol Phys 130, 151–160 (1990). https://doi.org/10.1007/BF00156786
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DOI: https://doi.org/10.1007/BF00156786