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Fig. 2

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Density model of the solar atmosphere with (full line) and without (dashed line) the slow sausage magnetoacoustic wave (the wave density amplitude is nR = 0.01). The horizontal full lines depict the plasma densities corresponding to the highest and lowest frequencies considered in the radio spectrum. The vertical dashed lines limit this density interval. The dotted line shows the lowest height of the zebra radio source corresponding to 2.5 GHz.

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