几何薄光学厚吸积盘谱线轮廓及成像研究

Emission Line Profiles and Images of Geometrically Thin and Optically Thick Accretion Disks

假设位于黑洞赤道面上做圆形轨道运动的吸积盘是几何薄、光学厚的。利用光子追踪法计算在Kerr度规下的光子运动轨迹,通过数值计算研究薄吸积盘的相对论谱线轮廓及成像。在大角度观测时,吸积盘下表面的光子对谱线轮廓及成像的影响是显著的。

In the paper, it is programmed to get relativistic iron lines profile and flux images of accretion disks. The simplest case of a geometrically thin, optically thick accretion disk around a Kerr（spinning） black hole is focused. Ray tracing method is used in the trajectory of the photon in the Kerr metric, by numerical calculation to model theoretical emission line profiles and disk images. We get relativistic iron lines profile which is about flux varies as frequency varies and images of accretion disks. Viewing at large inclinations,because of contribution of the photons under the surface of the disk,the line profile appear doublepeaked profile and the images are significantly changed.