2 papers
astro-ph.HE2020
Change of a Weibel-type to an Alfvénic shock in pair plasma by upstream waves
M E Dieckmann, J D Riordan, A Pe'er
We examine with particle-in-cell (PIC) simulations how a parallel shock in pair plasma reacts to upstream waves, which are driven by escaping downstream particles. Initially, the s…
astro-ph.HE2018
Pitch-Angle Diffusion and Bohm-type Approximations in Diffusive Shock Acceleration
John Daniel Riordan, Asaf Pe'er
The problem of accelerating cosmic rays is one of fundamental importance, particularly given the uncertainty in the conditions inside the acceleration sites. Here we examine Diffus…