Spectral and spatial observations of microwave spikes and zebra structure in the short radio burst of May 29, 2003
G. P. Chernov, R. A. Sych, N. S. Meshalkina, Y. Yan, and C. Tan

TL;DR
This study analyzes a rare high-frequency solar radio burst with zebra structure, localizing emission sources, estimating plasma parameters, and proposing mechanisms for spike and zebra-structure generation using spectral and spatial data.
Contribution
It presents detailed spectral and spatial analysis of a rare high-frequency zebra-structure solar radio burst, proposing a plasma wave coalescence mechanism for its generation.
Findings
Identified five scales of zebra structures in the burst.
Localized emission sources to specific flare region loops.
Suggested plasma wave coalescence with whistlers as the generation mechanism.
Abstract
The unusual radio burst of May 29, 2003 connected with the M1.5 flare in AR 10368 has been analyzed. It was observed by the Solar Broadband Radio Spectrometer (SBRS/Huairou station, Beijing) in the 5.2-7.6 GHz range. It proved to be only the third case of a neat zebra structure appearing among all observations at such high frequencies. Despite the short duration of the burst (25 s), it provided a wealth of data for studying the superfine structure with millisecond resolution (5 ms). We localize the site of emission sources in the flare region, estimate plasma parameters in the generation sites, and suggest applicable mechanisms for interpretating spikes and zebra-structure generation. Positions of radio bursts were obtained by the Siberian Solar Radio Telescope (SSRT) (5.7 GHz) and Nobeyama radioheliograph (NoRH) (17 GHz). The sources in intensity gravitated to tops of short loops at 17…
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