吸积盘内区相对论效应与活动星系核“紫外超”现象  

RELATIVISTIC EFFECTS AROUND THE INNER REGION OF ACCRETION DISK AND THE "UV EXCESS" OF AGN

作　　者：吴学兵[1] 

机构地区：[1]华中师范大学物理系

出　　处：《华中师范大学学报（自然科学版）》1993年第2期164-170,共7页Journal of Central China Normal University：Natural Sciences

摘　　要：通过比较在牛顿、拟牛顿及相对论框架下分别得到的吸积盘内区辐射流,指出相对论模型的有效温度比牛顿模型低而且在盘内变化较小,从而更适合于天体的单温黑体谱拟合。本文采用相对论模型对活动星系核“紫外超”现象中的黑体谱成分重新进行了讨论,给出了“紫外超”产生区域的一些具体特性。By comparing the various radiation fluxs from the inner region of accretion disks at Newtonian, Pseudo-Newtonian and relativistic frame, we point out that effective temperature of relativistic model is lower and less changeable than that of Newtonian model. So relativistic model is more suitable for single-temperature simulation of AGN's blackbody spectrum. A new simulation to the blackbody spectrum of some AGNs with 'UV Excess' are performed by using relativistic accretion disk model and some characteristics of the region where the 'UV Excess' generates are obtained in this paper.

关 键 词：吸积盘 相对论 活动星系核 紫外超 

分 类 号：P145[天文地球—天体物理]