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Fig. 7

image

Dispersion relations at 08:00 on 20 January 2015. a) Distribution functions for cometary water ions (solid blue curve) and solar wind protons (dash-dotted orange curve) and alpha particles (dashed black curve). b) Real part of ω as a function of wave number. c) The imaginary part of ω as a function of wave number. In this case γ> 0 for all three curves, which means that these modes are damped. The blue curves represent the same mode as the blue curves in Fig. 8.

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