A transport model for the diffusive shock acceleration and modulation of anomalous cosmic rays in the heliosphere

Details A transport model for the diffusive shock acceleration and modulation of anomalous cosmic rays in the heliosphere A transport model for the diffusive shock acceleration and modulation of anomalous cosmic rays in the heliosphere

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...101.4791l&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A3, p. 4791-4804

Physics

Plasma Physics

49

Interplanetary Physics: Cosmic Rays, Interplanetary Physics: Energetic Particles, Heliospheric, Interplanetary Physics: Interplanetary Shocks, Space Plasma Physics: Charged Particle Motion And Acceleration

Scientific paper

Standard transport theory is used to investigate the acceleration and modulation of anomalous cosmic rays during solar minimum periods. With the developed anomalous cosmic ray transport model, pickup ions are transformed into anomalous cosmic rays by diffusive shock acceleration at the heliospheric termination shock. The emphasis is on explaining the 1987 cosmic ray spectra at large radial distances in the equatorial plane. Energy density calculations of cosmic ray spectra at the termination shock suggest that the termination shock might be strongly mediated by anomalous cosmic rays. Therefore, in the spirit of nonlinear shock acceleration theory, the termination shock is modeled as a hyperbolic tangent. Calculations show that realistic anomalous cosmic ray intensity radial gradients can only be achieved, within the framework of our assumptions, for a termination shock structure with a compression ratio of 3.2

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