Scaling laws in high-energy inverse compton scattering. II. Effect of bulk motions
Scaling laws in high-energy inverse compton scattering. II. Effect of bulk motions
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高能逆康普顿散射中的标度定律。
DOI：
10.1103/physrevd.81.083007
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
N. Itoh
中科院分区：
文献类型：
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作者：
S. Nozawa;Y. Kohyama;N. Itoh
我们研究了高能非热电子对宇宙微波背景光子的逆康普顿散射。我们将前一篇论文所得到的形式主义推广到电子相对于CMB坐标系有非零体运动的情况。假设电子分布为幂律分布，我们发现概率分布函数P{sub 1，K}（s）的标度律与对应于零体运动的P{sub 1}（s）的标度律相同，其中峰高和峰位置仅取决于幂指数参数。我们用解析法解出了速率方程。发现光谱强度函数也具有相同的标度律。体运动对谱强度函数的影响很小。本研究将适用于分析射电星系和天体物理喷流等具有非零整体运动的各种天体物理物体的x射线和γ射线发射模型。
We study the inverse Compton scattering of the CMB photons off high-energy nonthermal electrons. We extend the formalism obtained by the previous paper to the case where the electrons have nonzero bulk motions with respect to the CMB frame. Assuming the power-law electron distribution, we find the same scaling law for the probability distribution function P{sub 1,K}(s) as P{sub 1}(s) which corresponds to the zero bulk motions, where the peak height and peak position depend only on the power-index parameter. We solved the rate equation analytically. It is found that the spectral intensity function also has the same scaling law. The effect of the bulk motions to the spectral intensity function is found to be small. The present study will be applicable to the analysis of the x-ray and gamma-ray emission models from various astrophysical objects with nonzero bulk motions such as radio galaxies and astrophysical jets.