Collisionless Shock 4

[HEDS11-02(Invited)] Particle Acceleration Upstream of Relativistic Collisionless Shocks

*Masanori Iwamoto¹, Takanobu Amano², Yosuke Matsumoto³, Shuichi Matsukiyo⁴, Masahiro Hoshino² (1. Kyoto University, 2. The University of Tokyo, 3. Chiba University, 4. Kyushu University)

Particle acceleration at relativistic collisionless shocks is studied by particle-in-cell simulations. We demonstrate that efficient particle acceleration occurs in the upstream and that nonthermal ions and electrons are generated. We discuss the detailed acceleration mechanism and estimate the maximum attainable energy.