含平流(advection)的热单温吸积流的径向结构

The Radial Structure of Hot One Temperature Accretion Flows with Advection

本文在小粘滞参数（α＝０．１）、低吸积率的条件下，借助含平流的热吸积流的自相似解，考虑非热正负电子对产生，采用分两个区域分别求解然后对接的方法，研究了含平流的热单温吸积流的径向结构．证实了热吸积流所具有的一些显著特征和基本性质，同时得到一些新的结果：含平流的热吸积流存在一个临界半径ｒｃｒ；明确指出含平流的热吸积流的辐射冷却率与中心天体的质量成平方反比关系；提出正负电子对过程对含平流的热吸积流的辐射过程有显著影响．

Considering nonthermal e ± pair production, this paper is focused on the radial structure of hot one-temperature accretion flows with advection under the condition of small viscous parameter (α=0.1) and low mass-accretion rates. Self similar relations of hot flow with advection have been adopted. The authors have used a scheme, in which the two regions of accretion flow are calculated separately and then joined together. Some typical features of hot flow with advection have been confirmed, and several new results obtained: there exists a critical radius r cr ; the local cooling rate is inversely proportional to the square of the mass of the central object; the e ± pair process affects significantly the radiation of hot flows with advection.