On the origin of the foreward velocity dispersion of ion events observed near the Earth's and Jupiter's bow shock

Details On the origin of the foreward velocity dispersion of ion events observed near the Earth's and Jupiter's bow shock On the origin of the foreward velocity dispersion of ion events observed near the Earth's and Jupiter's bow shock

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..16..149a&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 16, no. 4, p. (4)149-(4)152

Astronomy and Astrophysics

Astronomy

2

Earth (Planet), Earth Magnetosphere, Interplanetary Magnetic Fields, Ions, Jupiter (Planet), Magnetosheath, Planetary Magnetospheres, Shock Waves, Ampte (Satellites), Astronomical Models, Explorer Satellites, Particle Energy, Ulysses Mission, Velocity, Voyager 2 Spacecraft, Wave Scattering

Scientific paper

We examined a great number of ion events observed in the vicinity of the Earth's (CCE/AMPTE, IMP-6, 7, and 8) and Jupiter's (Voyager-2, Ulysses) bow shock, which showed during their onset (decay) phase earlier (later) flux increases (decreases) at higher than at lower energies, i.e. presented forward velocity dispersion (FVD). The comparison of the whole set of observations with several theoretical frameworks (shock acceleration, ExB drift, propagation-temporal process, magnetosheath scattering) suggests that a rigidity dependent leakage process of magnetospheric ions (due to wave scattering) in the magnetosheath is most probably the main agent for the appearance of FVD of energetic (E greater than or equal to 30 keV) ions upstream and downstream from the Earth's and Jupiter's bow shock.

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