Systematic Research of Irradiation in Accretion Disks

我们研究了吸积盘受到中心物体和/或吸积盘本身照射的各种影响。主要结果如下：(1)康普顿阻力效应：当气体光学很薄时，通过辐射场的康普顿阻力消除气体的角动量。这是一种新型的驱动机制，我们称之为‘β吸积盘’。(Ii)我们研究了这种β吸积盘的结构和演化与原行星盘、X射线星和活动星系核的关系。(Iii)我们还计算了(相对论)吸积盘在中心区域的辐射光谱。为了解释X射线新星中的电子-正电子对湮没线，我们建立了吸积盘风从盘面吹走的模型，并计算了线发射光谱。

We examined the various effects which an accretion disk suffered from irradiation by the central object and/or accretion disk itself. The followings are our main results.(i) The effect of the Compton drag : The angular momentum of the gas is removed via the Compton drag of the radiation fields when the gas is optically thin. This is the new type driving mechanism, we call it the 'beta accretion disk' .(ii) We examined the structure and evolution of such a beta disk in relation to protoplanetary disks, X-ray stars, and AGNs.(iii) We also calculated the emission spectrum from the (relativistic) accretion disk which is irradiated by the central region. The spectrum is remarkably modified.(iv) In order to explain the electron-positron pair annihilation line in X-ray nova, we constructed the model of an accretion disk wind blown off from the disk and calculated the line-emission spectrum.