Cyclotron wave instability in the corona and origin of solar radio emission with fine structure

✍ Scribed by V. V. Zheleznyakov; E. Ya. Zlotnik

• Publisher: Springer
• Year: 1975
• Tongue: English
• Weight: 530 KB
• Volume: 44
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00153225

✦ Synopsis

The results of investigation of the cyclotron wave instability in the corona for Bernstein modes and plasma waves in a hybrid band have been used to interpret zebra-pattern phenomena. Two models of the generation region of parallel drifting bands are considered: the model of the point source localized at the apex of the magnetic trap and the model of a distributed source extended along the magnetic flux tube. In the first model it is assumed that a harmonic character of zebrapattern appears either in coalescence of excited Bernstein modes at different harmonics of the gyrofrequency or in coalescence of these modes with plasma waves excited in the hybrid band. In the latter case if the magnetic field changes in time a pulsating generation regime occurs. In the second model, the emission bands appear in the regions of double plasma resonance as a result of coalescence of longitudinal waves excited in the hybrid band. Estimations of the magnetic field and the nonequilibrium component density necessary for the zebra-pattern to generate are presented. * Here and below a roman II before the number of the formula or figure denotes a reference to the corresponding formula or figure in the paper by Zheleznyakov and Zlotnik (1975b) cited as II. A roman I refers to the paper by Zheleznyakov and Zlotnik (1975a). Solar Physics 44 (1975) 461-470. All Rights Reserved Copyright 9 1975 by D. Reidel Publishing Company, Dordrecht-Holland * This equality as well as the formula (2.2) are given under the ,assumption that Dn,~t-2~.