Fig. 8.

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Spectra for two double-banded events: (a,c) Spectra of ne, B and B|| (b,d) compressibility ratio ξe) for the two events. The yellow and violet shadings show the frequency ranges for the right- (RH) and left-handed (LH) polarization respectively. The red vertical line shows the local proton cyclotron frequency. We note that a sharp peak in the ne spectrum at ∼1.2 Hz is related to the spacecraft interference.

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