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电信和无线电工程
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN 打印: 0040-2508
ISSN 在线: 1943-6009

卷:
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电信和无线电工程

DOI: 10.1615/TelecomRadEng.v64.i7.70
pages 555-569

On the Velocity of Beam Generating Fast-Drift Radio Bursts in Solar Corona

V. M. Kontorovich
Institute of Radio Astronomy, National Academy of Sciences of Ukraine 4, Krasnoznamennaya St., Kharkov 61002, Ukraine
A. Yu. Nikitin
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Sir., Kharkiv 61085, Ukraine

ABSTRACT

It is shown that the data on drift velocities of III type radio bursts and the velocities of II-type HB-burst components (of “herring-bone” structure) are not contradictory to the views of free electron-beam expansion in the solar corona if the low-speed Coulomb electron scattering is taken account of. The findings of the kinetic theory suggest that the characteristic average drift velocity is largely dependent upon the height of beam initiation and, consequently, upon the plasma density at the point of its origin. This, to a large extent, results in the difference between the velocities of the beams generated by chromospheric bursts and the beams being produced at shock wave fronts in the solar corona.


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