Comet-solar wind interaction through ion-proton beam instability

Details Comet-solar wind interaction through ion-proton beam instability Comet-solar wind interaction through ion-proton beam instability

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..606p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 606-620.

Astronomy and Astrophysics

Astrophysics

7

Comet Tails, Particle Acceleration, Plasma Interactions, Solar Wind, Cyclotron Radiation, Ion Motion, Momentum Transfer, Proton Beams, Solar Protons, Whistlers, Comets, Solar Wind, Interactions, Ions, Acceleration, Comet Tails, Electromagnetic Properties, Velocity, Protons, Stability, Simulations, Particles, Techniques, Waves, Momentum, Diagrams, Calculations, Parameters, Kinematics, Energy, Equations Of Motion, Heavy Ions

Scientific paper

The acceleration of cometary ions in the distant cometary tail by an electromagnetic beam instability, which is caused by the relative drift velocity between the cometary ions and solar protons is studied. The linear phase of the instability is analyzed by numerical evaluation of the Vlasov dispersion relation. A particle simulation is used to study the nonlinear phase of the instability. Right-hand polarized cyclotron waves are made unstable by the presence of ion beams. The cometary tail ions are accelerated mainly during the reduced-growth phase of the instability. The cyclotron waves cause momentum transfer from solar wind protons to cometary tail ions. The acceleration of cometary ions through the electromagnetic beam instability is found to be 500-5000 cm/s-squared.

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