Abstract
In high-speed solar wind, propagating Alfvén waves can be transferred into fast magnetosonic waves. When both the magnetic field strength and Alfvén wave velocity approach zero, fast magnetosonic waves will be transferred into ion-acoustic waves. As the phase velocity of ion-acoustic waves is slightly greater than the thermal velocity of protons, the turbulence energy of ion-acoustic waves can largely be absorbed by protons and can cause the mean temperature of protons to be greater than that of electrons by stochastic turbulence heating of ion-acoustic waves for protons.
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Jiling, H. Turbulence Heating for Protons in High-Speed Solar Wind. Solar Physics 185, 391–396 (1999). https://doi.org/10.1023/A:1005148823116
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DOI: https://doi.org/10.1023/A:1005148823116