含平流单温吸积流:电子对由非热过程产生情形  

THE ONE-TEMPERATURE ACCRETION FLOWS WITH ADVECTION: e~± PAIR PRODUCTION BY NONTHERMAL PROCESSES

作　　者：杨丕博[1] 陈韶丽[2] 刘效庸 杨兰田[1] 

机构地区：[1]华中师范大学天体物理所,武汉430079 [2]武汉纺织工学院基础部,武汉430073

出　　处：《天文学报》1998年第2期193-201,共9页Acta Astronomica Sinica

基　　金：国家自然科学基金;国家攀登计划资助

摘　　要：本文利用含平流的热吸积流的自相似解，在电子对为非热产生的情况下，求得了含平流的热单温吸积流在小吸积率时的径向结构．证实了含平流热吸积流所具有的显著特征和基本性质，并得到一些新的结果：含平流的热吸积流存在一个临界半径r，含平流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，含平流热吸积的电子对密度高于SLE模型吸积盘．By means of the self-similar relahon of hot flows with advection and in consideration of the nonthermal e± pair-production, we examine the radial structrue of hot one-temperature accretion flows with advection. Some typical features of the hot flow with advection have been confirmed, and the following new results obtained.There exists a critical radius rcr. The local cooling rate is inversely prooinional to the sqare of mass of the cental object. The pair density in the accretion flows with advechon is higher than that of the SLE disk.

关 键 词：热吸积流 平流 正负电子对 非热过程 吸积盘 

分 类 号：P145.8[天文地球—天体物理]