Physics
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pabei..13...75x&link_type=abstract
Prog. Astron., Vol. 13, No. 1, p. 75 - 83
Physics
Broad-Line Regions: Active Galactic Nuclei, Broad-Line Regions: Radiation Mechanisms, Broad-Line Regions: Intergalactic Clouds
Scientific paper
One of the 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 a unique and important probe of the physics of AGNs. This paper discusses the various physical conditions of the BLR, reviews the recent progress and situation in the observations and theoretical studies of the BLR. In paper (I), the authors describe the fundamental framework of the BLR - the photoionization model of gas clouds and discuss how these emission clouds are originated and confined.
Cheng Fu-zhen
Xue Suijian
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