强磁场中热光子的康普顿硬化

Comptonization of Thermal Photons in Strong Magnetic Field in the Laboratory Reference Frame

从实验室坐标系 Compton散射截面出发 ,对其中的谱函数进行了重新计算 ,除了谱函数的共振项系数有修正外 ,还得到一个直接依赖于磁场的非共振项 (磁场项 ) .利用改进了的谱函数 ,就强磁场脉冲星表面的高能电子束对热光子的 Compton硬化作用进行了计算 .结果表明 :1每一个共振散射都存在一个上限能量 ,其大小与磁场有关 ;2当磁场较弱时 ,由于磁场项的存在 ,每一个共振散射都存在一个范围相当宽的高能尾巴 .

This paper worked out a new spectrum function by using the Compton scattering cross section in laboratory reference frame. It not only modified the resonant item, but also got a non resonant item (an item which rely on the intensity of the magnetic field). By this new spectrum function, this paper calculated the comptonization of thermal photons by relativistic electron beams on the surface of the pulsar. The calculation result shows: ① There is an up limit energy of out coming photons in the resonant scattering. The up limit energy rely on the intensity of the magnetic field. ②When the magnet is weak, every resonant scattering spectrum has an extensive tail for the non resonant item.