含电子对双温吸积盘的辐射谱

The Spectrum of Two-temperature Accretion Disk with Electron-positron Pair

主要研究含正负电子对双温吸积盘的辐射谱 ,正负电子对由热对产生过程而产生。吸积盘是几何薄、光学薄的 ,它的辐射机制包括轫致辐射、轫致辐射的 Com pton化以及正负电子的湮灭辐射。这种盘的光子辐射谱是幂律的与一些天体 X射线谱的观测相似。

We investigate the X-ray spectrum of two-temperature accretion disk and consider the effects of thermal electron and positron pair production upon the structure and spectrum of accretion disk. The radiation mechanisms of disk are bremsstrahlung, comptonized bremsstrahlung and electron-positron pair annihilation. The structure of accretion disk is geometrically thin and the disk is optically thin to absorption. The results show that the X-ray spectrum of the accretion disks is the distribution of power-law. For physically reasonable value of the parameters, the radiation spectrum of accretion disk is consistent with observation of some objects.