Compton scattering of self-absorbed synchrotron emission
Compton scattering of self-absorbed synchrotron emission
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DOI：
10.1093/mnras/stt1461
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发表时间：
2012-04
影响因子：
4.8
通讯作者：
He Gao;W. Lei;Xuefeng Wu;Bing Zhang
中科院分区：
文献类型：
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作者：
He Gao;W. Lei;Xuefeng Wu;Bing Zhang
同步辐射自康普顿散射（SSC）是伽玛射线暴（GRB）和活动星系核等许多天体源的重要辐射机制。本文给出了同步辐射中强、弱自吸收康普顿散射的解析近似。研究了同步辐射特征谱突变的所有可能阶数（nu（a），nu（m）和nu（c））。在弱自吸收区，即nu（a）nu（c），由于同步辐射吸收，低能电子的加热导致电子堆积，并形成除了破幂律分量之外的热分量。这导致同步加速器和SSC光谱分量的双分量（热+非热）光谱。对于nu（c）根nu（m）nu（c）（nu（a）max（nu（m），nu（c））.
Synchrotron self-Compton (SSC) scattering is an important emission mechanism in many astronomical sources, such as gamma-ray bursts (GRBs) and active galactic nuclei. We give a complete presentation of the analytical approximations for the Compton scattering of synchrotron emission with both weak and strong synchrotron self-absorption. All possible orders of the characteristic synchrotron spectral breaks (nu(a), nu(m) and nu(c)) are studied. In the weak self-absorption regime, i.e. nu(a) nu(c), heating of low-energy electrons due to synchrotron absorption leads to pile-up of electrons, and form a thermal component besides the broken power-law component. This leads to two-component (thermal + non-thermal) spectra for both the synchrotron and SSC spectral components. For nu(c) root nu(m)nu(c) (nu(a) max(nu(m), nu(c)).