Pulsations of type IV solar radio emission: The bounce-resonance effects

B. I. Meerson*, P. V. Sasorov, A. V. Stepanov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

A mechanism of excitation of radial oscillations of a 'magnetic tube' is proposed for the interpretation of a periodic modulation of type IV radio burst intensity in the meter and decimeter range. After the flare a configuration with denser plasma extended along the magnetic field can be formed in the corona. Eigenoscillations of such a system are damped by MHD-wave emission into the external coronal plasma. However, if high energy protons with β ≳ 0.2 are trapped by this configuration, the damping of oscillations can be made up for by an amplification due to bounce-resonant plasma instability. The regularity of the pulse period is explained by presence of a maximum in the wave growth rate dependence on the frequency.

Original languageEnglish
Pages (from-to)165-179
Number of pages15
JournalSolar Physics
Volume58
Issue number1
DOIs
StatePublished - Jun 1978
Externally publishedYes

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