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《Progress In Astronomy》 1995-01
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The Broad-line Region in Active Galactic Nuclei (Ⅰ)

Xue Suijian; Cheng Fuzhen(Center For Astropbysics, University of Science and Technology of China. Hefei 230026Shaanxi Astronomical Observatory The Chinese Academy of Sciences. Linfong 710600)  
One of typical characteristics of active galactic nuclei(AGNs, except BL Lac objects) is that strong and broad emission lines appear in their spectra. It is therefore that the broad-line region (BLR), from which broad emission lines come,affords us a unique and important probe of the physics of AGNs. This paper will discuss the various physical conditions of the BLR, review the recent progress and situation in the observations and theoretical studies of the BLR. In paper (I), we will describe the foundamental framework of the BLR──the photoionization model of gas clouds and discuss how these emission clouds are originated and comfined.
【Fund】: 国家科委攀登计划基金
【CateGory Index】: P157.6
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1 Yan Ming You Junhan(Center jor Astrophysics, University oj Science and Technology of China)Cheng Fuhua(Center of Astronomy and Astrophysics, CCAST (World Laboratory), Center for Astrophysics, University of Science and Technology of China);THE RELATION BETWEEN CERENKOV REDSHIFT OF HI LINES OF QUASARS AND THE INTENSITY RATIO I(Lya)/(CIV)[J];中国天文和天体物理学报(英文版);1989-03
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