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Radioheliograph Observations of Microwave Bursts with Zebra Structures

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Abstract

The so-called zebra structures in radio dynamic spectra, specifically their frequencies and frequency drifts of emission stripes, contain information on the plasma parameters in the coronal part of flare loops. This paper presents observations of zebra structures in a microwave range. Dynamic spectra were recorded by Chinese spectro-polarimeters in the frequency band close to the working frequencies of the Siberian Solar Radio Telescope. The emission sources are localized in the flare regions, and we are able to estimate the plasma parameters in the generation sites using X-ray data. The interpretation of the zebra structures in terms of existing theories is discussed. The conclusion has been arrived at that the preferred generation mechanism of zebra structures in the microwave range is the conversion of plasma waves to electromagnetic emission on the double plasma resonance surfaces distributed across a flare loop.

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Authors and Affiliations

  1. Institute of Solar-Terrestrial Physics SB RAS, Lermontov St. 126A, Irkutsk, 664033, Russia

    A. T. Altyntsev, S. V. Lesovoi, N. S. Meshalkina & R. A. Sych

  2. Key Laboratory of Solar Activity, National Astronomical Observatories, CAS, Beijing, 100012, China

    R. A. Sych & Y. Yan

Authors
  1. A. T. Altyntsev
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  2. S. V. Lesovoi
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  3. N. S. Meshalkina
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  4. R. A. Sych
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  5. Y. Yan
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Corresponding author

Correspondence to N. S. Meshalkina.

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Altyntsev, A.T., Lesovoi, S.V., Meshalkina, N.S. et al. Radioheliograph Observations of Microwave Bursts with Zebra Structures. Sol Phys 273, 163–177 (2011). https://doi.org/10.1007/s11207-011-9856-9

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  • DOI: https://doi.org/10.1007/s11207-011-9856-9

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