Concerning mechanisms for the zebra pattern formation in the solar radio emission

Journal Article · Sun Feb 15 00:00:00 EST 2009 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X09020081· OSTI ID:21405997

Laptukhov, A I; Chernov, G P ^[1]

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1. Russian Academy of Sciences, Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio-Wave Propagation (Russian Federation)

The nature of the zebra patterns in continuous type-IV solar radio bursts is discussed. The most comprehensively developed models of such patterns involve mechanisms based on the double plasma resonance and plasma wave-whistler interaction. Over the last five years, there have appeared a dozen papers concerning the refinement of the mechanism based on the double plasma resonance, because, in its initial formulation, this mechanism failed to describe many features of the zebra pattern. It is shown that the improved model of this mechanism with a power-law distribution function of hot electrons within the loss cone is inapplicable to the coronal plasma. In recent papers, the formation of the zebra pattern in the course of electromagnetic wave propagation through the solar corona was considered. In the present paper, all these models are estimated comparatively. An analysis of recent theories shows that any types of zebra patterns can form in the course of radio wave propagation in the corona, provided that there are plasma inhomogeneities of different scales on the wave path. The superfine structure of zebra stripes in the form of millisecond spikes with a strict period of {approx}30 ms can be attributed to the generation of continuous radio emission in the radio source itself, assuming that plasma inhomogeneities are formed by a finite-amplitude wave with the same period.

• OSTI ID: 21405997
• Journal Information: Plasma Physics Reports, Vol. 35, Issue 2; Other Information: DOI: 10.1134/S1063780X09020081; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DISTRIBUTION FUNCTIONS
ELECTRONS
INTERACTIONS
PLASMA
PLASMA WAVES
SOLAR CORONA
SOLAR RADIO BURSTS
SOLAR RADIOWAVE RADIATION
WAVE PROPAGATION
WHISTLERS
ATMOSPHERES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
FUNCTIONS
LEPTONS
NOISE
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR RADIATION
STELLAR ACTIVITY
STELLAR ATMOSPHERES
STELLAR CORONAE
STELLAR RADIATION