講座 「相対論的プラズマ物理学」
相対論的プラズマ物理学 7.相対論的粒子加速と宇宙線の起源
2002 年 78 巻 7 号 p. 668-677
詳細
2002 年 78 巻 7 号 p. 668-677
The origin of high energy particles seen radiating in astrophysical synchrotron sources is still a major unresolved problem in high-energy and plasma as trophysics. The diffusive/Fermi shock acceleration under turbulent fields has been discussed as one of important processes in the production of the high-energy particles, but alternative mechanisms that can accelerate particles in a short time scale have been recently discussed as efficient non-thermal particle acceleration mechanisms. First we review the standard diffusive/Fermi acceleration, and then discuss new ideas involving the direct/fast acceleration mechanisms of the magnetic reconnection and the electron shock surfing process.
