Alfvén waves in the vicinity of Uranus: The role of energetic proton thermal anisotropy

Details Alfvén waves in the vicinity of Uranus: The role of energetic proton thermal anisotropy Alfvén waves in the vicinity of Uranus: The role of energetic proton thermal anisotropy

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...101.4849r&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A3, p. 4849-4854

Physics

Plasma Physics

1

Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Kinetic And Mhd Theory

Scientific paper

Spacecraft observations in the vicinity of planetary bow shocks indicate the existence of proton beams and of magnetohydrodynamic (MHD) waves. We analyze the dispersion of such waves in the presence of energetic beams and show that the role of temperature anisotropy in the growth of low-frequency MHD waves is significantly enhanced by weak relativistic effects. The present analysis of ion beam instability near Uranus shows that thermal anisotropy of energetic protons coupled with the relativistic dependence of their mass on energy leads to an increase of the resonant Alfvénic wave growth rate and to a dispersion curve which differs from that of the isotropic case. MHD-like waves, excited by energetic proton beams near the planetary bow shock have (in the presence of thermal anisotropy) a dispersion relation similar to that of Alfvén waves at wavelengths of the order of 2×108 m and can propagate in the solar wind plasma away from Uranus.

Affiliated with

Also associated with

No associations

Rating

Alfvén waves in the vicinity of Uranus: The role of energetic proton thermal anisotropy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Alfvén waves in the vicinity of Uranus: The role of energetic proton thermal anisotropy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alfvén waves in the vicinity of Uranus: The role of energetic proton thermal anisotropy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1610641