Inverse Comptonization by one-dimensional relativistic electrons
Inverse Comptonization by one-dimensional relativistic electrons
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DOI：
10.1086/165853
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发表时间：
1987-12
期刊：
影响因子：
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通讯作者：
E. Canfield;W. M. Howard;E. Liang
中科院分区：
文献类型：
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作者：
E. Canfield;W. M. Howard;E. Liang
利用蒙特卡罗方法研究了具有一维动量分布的相对论电子对软光子的逆康普顿上散射产生的γ射线谱。在强磁场（B > 10[sup 10] G）中，当横向能量的同步辐射冷却时间比通过库仑或康普顿碰撞的各向同性化时间短得多时，可以获得这样的电子分布。从这种康普顿上散射中出现的伽马射线谱可能与宇宙伽马射线暴有关，如果它们起源于强磁化中子星的话。作者发现，对于足够高的电子纵向温度的输出功率是强烈的电子动量方向上的光束，和频谱软化迅速增加的角度从动量方向。这对伽玛射线暴光谱的解释、可探测性和统计都有影响。
The authors study gamma-ray spectra produced by the inverse Compton upscattering of soft photons by relativistic electrons with a one-dimensional momentum distribution using the Monte Carlo technique. Such electron distributions may be obtained in strong magnetic fields (B > 10[sup 10] G) when the synchrotron cooling time of transverse energy becomes much shorter than the isotropization time via Coulomb or Compton collisions. Gamma-ray spectra emerging from such Compton upscatterings may be relevant to cosmic gamma-ray bursts if they originate from strongly magnetized neutron stars. The authors find that for high enough electron longitudinal temperatures the output power is strongly beamed in the electron momentum direction, and the spectrum softens rapidly with increasing angle from the momentum direction. This has implications for gamma-ray burst spectra interpretations, detectability, and statistics.