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Fig. 1. | Earth, Planets and Space

Fig. 1.

From: Field-line resonance structures in Mercury’s multi-ion magnetosphere

Fig. 1.

(a) Ion density ratio (η = Nion/Ne) of H+ (dashed), He+ (solid), and He2+ (dotted-dashed). Here we assume ηHe2 = 2.5%. (b) The critical frequencies: cut offs ΩL (R) and ion-ion hybrid (and Alfvén) resonance (Ωii(A)) frequencies. The horizontal and vertical axes are normalized distance X = x/L x and normalized frequency Ω = ω/ωci. Here shaded regions represent frequency stop-bands where the wave is evanescent.

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