Abstract The direction of propagation of low frequency magnetic fluctuations generated by cometary ion pick-up is examined by means of one-dimensional electromagnetic hybrid simulations. The newborn ions are injected at a constant rate, and the helicity and direction of propagation of magnetic fluctuations are explored for cometary ion injection angles of 0° and 90° relative to the solar wind magnetic field. The parameter η represents the relative contribution of wave energy propagating in the direction away from the comet, parallel to the beam. For small (quasi-parallel) injection angles η was to found to be of order unity, while for larger (quasi-perpendicular) angles η was found to be of order 0.5.
The directional dependence of cometary magnetic energy density in the quasi-parallel and quasi-perpendicular regimes
Advances in Space Research ; 11 , 9 ; 79-82
1991-01-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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