Monte Carlo calculations are presented of ion and electron spectra produced by Fermi acceleration in a steady state plane parallel modified shock for Mach numbers of 170 and 43. The simulation assumes isotropic elastic scattering in the local fluid frame, consistent with results from plasma simulations. The shock structure is calculated taking into account the back pressure of accelerated ions, and includes self-consistent pickup and acceleration of thermal ions. Results are described for two dependences of scattering mean free path on rigidity. It is shown that these shocks are extremely efficient, with up to 98 percent of the entering energy flux emerging as relativistic ions. Electron spectra are steeper than ion spectra at virtually all energies relevant for radio emission from SN remnants (0.3-30 GeV) and are slightly concave upward.
No takes yet. Share an insight, caveat, or question.
Ellison et al. (1991) studied this question.