Kinematic Models of BLR Gas and Line Profiles of HeIλ5876 and Hβ in AGNs  

作　　者：薛随建 程福臻 John Kwan 

机构地区：[1]Center for Astrophysics, University of Science and Technology of China, Hefei 230026, PRC [2]Shaanxi Astronomical Observatory, Academia Sinica, Lintong 710600, PRC [3]Department of Physics and Astronomy, University of Massachusetts, USA [4]Department of Astronomy, Beijing Normal University, Beijing 100875, PRC

出　　处：《Science China Mathematics》1994年第4期487-496,共10页中国科学：数学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China

摘　　要：The present paper derives the modified expression of broad emission line profiles for the kinematic model of radiation pressure driving BLR gas outflow in the BLR, and discusses the intrinsic emission difference between the two lines HeIλ5876 and Hβ. It is shown that the fact that the observed line width of HeIλ5876 is broader than that of Hβ cannot be explained by W. G. Mathews’ modified model. For comparison, line profiles of gravitational infall model and orbital disk model are also calculated; the latter is in good agreement with the observations. Thereupon, conclusion is reached that gravitational infall is an important process in the BLR gas motion.The present paper derives the modified expression of broad emission line profiles for the kinematic model of radiation pressure driving BLR gas outflow in the BLR, and discusses the intrinsic emission difference between the two lines HeIλ5876 and Hβ. It is shown that the fact that the observed line width of HeIλ5876 is broader than that of Hβ cannot be explained by W. G. Mathews' modified model. For comparison, line profiles of gravitational infall model and orbital disk model are also calculated; the latter is in good agreement with the observations. Thereupon, conclusion is reached that gravitational infall is an important process in the BLR gas motion.

关 键 词：AGNS broad-line REGION (BLR) broad-line profiles. 

分 类 号：O59[理学—应用物理]