Conveners
Particle acceleration and Radiation processes
- Frank Rieger
The present paper proposes a generalized description of Fermi-type acceleration processes, by following the momentum of the particle through a continuous sequence of accelerated frames, defined in such a way that the electric field vanishes at each point along the particle trajectory. This unified description of Fermi acceleration applies equally well in sub- and ultra-relativistic settings,...
The problem of accelerating cosmic rays is one of fundamental importance, particularly given the uncertainty in the conditions inside the acceleration sites. In this talk, I describe our work in which we examine diffusive shock acceleration in arbitrary turbulent magnetic fields, constructing a new model that is capable of bridging the gap between the very weak (δB/B_0 ≪ 1) and the strong...
Extracting the rotational energy by magnetic braking is the most promising mechanism driving relativistic outflows of active galactic nuclei, gamma-ray bursts, and pulsar winds, i.e., they must be Poynting dominated flow at their base.
On the other hand, the observed spectral and dynamical signatures of these relativistic objects infer that the magnetization $\sigma$ (the ratio of Poynting to...
