Physics
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.225..399f&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 225, March 15, 1987, p. 399-423. Research supported by
Physics
69
Cosmic Rays, Shock Waves, Time Dependence, Diffusion Coefficient, Injection, Mach Number
Scientific paper
The authors have solved the coupled time-dependent cosmic ray transport equation and gas equations numerically for a number of one-dimensional cases. Although they have kept the physics as simple as possible, they have included injection of particles at a gas shock and the momentum dependence of the cosmic ray diffusion coefficient. As well as confirming the existence of strictly steady solutions for low-Mach shocks, the authors have found that there exist quasi-steady solutions in which the post-shock cosmic ray pressure remains constant while the particle spectrum evolves continuously. For high Mach numbers the authors show that it is possible to set up cosmic-ray-dominated shocks with no current source of particles in which the pressure is provided by an ever-decreasing number of particles at higher and higher energies. Apart from this they have been able to confirm a number of previous conjectures based partly on test-particle theory and partly on the two-fluid approximation.
Falle Sam A. E. G.
Giddings J. R.
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