逆康普顿散射对中等银纬区银河弥漫γ射线的贡献

The Inverse Compton Contribution to Medium-Latitude Galactic Diffuse Gamma Rays

使用最近期的ＧＲＯ库中ＥＧＲＥＴ的γ射线数据，研究了逆康普顿散射对中等银纬区银河弥漫γ射线的贡献。采用了两种分析方法：其一为本文的新分析方法，其中银河宇宙与星际气体相互作用的γ射线的发射率ｑ／４π由γ射线数据本身确定；其二为通常的分析方法，即ｑ／４π由使用了局部银河宇宙线强度的观测值的理论估计给出。通过分析，我们获得了两种方法中逆康普顿散射的贡献与能量的依赖关系。结果表明，逆康普顿散射的贡献是大的。

The inverse Compton contribution to medium-latitude Galactic diffuse gamma rays is studied by using recent EGRET date in the GRO Archive.In our analysis,two methods are adopted.One is the new method given here,where gamma-ray emissivity produced in the interaction of Galactic cosmic rays with interstellar gas is determined by gamma-ray data themselves;the alternative is the method often used,where the emissivity is given by theoretical estimation.The energy dependences of inverse Compton contribution in the methods are obtained.Our results indicate that the inverse Compton contribution is important.