有吸积盘时径向运动云的谱线轮廓

在活动星系核的黑洞模型中,黑洞附近运动的电离云所发出的光线将要受到多普勒频移、引力红移和光线偏折等效应的影响,如果黑洞周围还有吸积盘存在,电离云的辐射还可能被吸积盘遮挡。本文全面地考虑了这些效应,利用光子输运方程方法,给出了在Schwarzchild度规中径向运动电离云发出的谱线轮廓的精确解,并发现在某些情况下将出现不对称的双峰结构。

Line Profile of Radially Flowing Clouds with Accretion Disk

According to the black hole model of active galactic nuclei, the light emitted from radially flowing clouds near a black hole should be affected by Doppler shift, gravitational red-shift and deflection of light. Shielding of the light emitted from flowing clouds by the disk should be taken into account. In this paper, precise line profiles of radially flowing clouds near a Schwarzchild black hole for a distant observer are obtained by solving the kinetic equation of photons. We find that the results obtained in this paper may be useful in interpreting the profiles and variations of some emission lines in active galactic nuclei.