A self-consistent determination of the heliospheric termination shock structure in the presence of pickup, anomalous, and galactic cosmic ray protons

Details A self-consistent determination of the heliospheric termination shock structure in the presence of pickup, anomalous, and galactic cosmic ray protons A self-consistent determination of the heliospheric termination shock structure in the presence of pickup, anomalous, and galactic cosmic ray protons

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...10217365l&link_type=abstract

Journal of Geophysical Research, Volume 102, Issue A8, p. 17365-17380

Physics

40

Interplanetary Physics: Cosmic Rays, Interplanetary Physics: Energetic Particles, Heliospheric, Interplanetary Physics: Heliopause And Solar Wind Termination, Interplanetary Physics: Pickup Ions

Scientific paper

A self-consistent time-dependent model is used to study the modification of the heliospheric termination shock in the upwind direction under the influence of three suprathermal particle populations, namely pickup, anomalous and galactic cosmic ray protons. By ensuring that the resulting modulated cosmic ray proton spectra are consistent with those observed by the Voyager 2 and Pioneer 10 spacecraft during the solar activity minimum in 1987, two alternative modifications of the shock can be identified. While the first is characterized by a low injection efficiency of pickup protons into the process of diffusive shock acceleration and mainly determined by those particles, the second, resulting from a high injection efficiency, is clearly dominated by anomalous cosmic rays.

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