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Whistlers in the solar corona and their relevance to fine structures of type IV radio emission

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Abstract

This short report concerns a general consideration of whistler manifestations in fine structures, including possible trajectories of obliquely propagating whistlers, the role of quasilinear diffusion and an interpretation of new observations. A whistler ray tracing and kinetic whistler growth rates under arbitrary angles to the magnetic field in the solar corona were calculated. Different regimes of a whistler instability yield divers elements of fine structures: different stripes in emission and absorption or millisecond pulsations, moreover, zebra-stripes can convert into fiber bursts and inversely. A new explanation of low-frequency absorption in fibers is proposed: it is connected with an attenuation of plasma-wave instability due to the fast electron diffusion by whistlers. Rope-like chains of fiber bursts are explained by a periodic whistler instability in a magnetic reconnection region.

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  1. Izmiran, 142092 Troitsk, Moscow Region, U.S.S.R.

    G. P. Chernov

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  1. G. P. Chernov
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Chernov, G.P. Whistlers in the solar corona and their relevance to fine structures of type IV radio emission. Sol Phys 130, 75–82 (1990). https://doi.org/10.1007/BF00156780

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  • DOI: https://doi.org/10.1007/BF00156780

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