Diffusive shock acceleration - Comparison of a unified shock model to bow shock observations

Details Diffusive shock acceleration - Comparison of a unified shock model to bow shock observations Diffusive shock acceleration - Comparison of a unified shock model to bow shock observations

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...318..474e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 318, July 1, 1987, p. 474-484. NASA-supported research.

Astronomy and Astrophysics

Astrophysics

36

Bow Waves, Magnetospheric Ion Density, Particle Acceleration, Particle Diffusion, Shock Waves, Ampte (Satellites), Collisionless Plasmas, Interplanetary Magnetic Fields, Solar Wind, Spectral Energy Distribution

Scientific paper

A comparison is made between recent AMPTE/IRM observations of diffuse ions detected upstream of the earth's bow shock when the interplanetary magnetic field was nearly parallel to the solar wind direction and a known collisionless quasi-parallel shock model. These observations, which provide the proton spectrum for all of velocity space, give a direct measure of the shock acceleration efficiency and show how thermal solar winds are injected into the diffusive shock acceleration mechanism. The model accurately describes the proton spectrum; moreover, it predicts the shock structure, the complete particle spectrum, the relative velocity distributions of different ion species in the down stream region, and the enhancement of heavy ions over protons relative to the unshocked solar wind.

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