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Ion-scale Waves Regulated by Plasma Beta and Cross Helicity: Observational Evidence for the Helicity Barrier in Imbalanced Solar Wind Turbulence
G. Q. Zhao et al 2026 The Astrophysical Journal Letters 1008 .
Caption: Figure 3.
Color-scale plot of wave occurrence rate in the (σc, β) space, where cells with a sample number less than 10 are indicated by the white color.
© 2026. The Author(s). Published by the American Astronomical Society.
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