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题名: Relations between the optical Fe II emission and ultraviolet spectra in active galactic nuclei
作者: Wang, TG ;  Zhou, YY ;  Gao, AS
刊名: ASTROPHYSICAL JOURNAL
出版日期: 1996
卷号: 457, 期号:1, 页码:111-117
关键词: BROAD-LINE REGION ;  PROFILES ;  QUASARS ;  QSOS ;  IUE
学科分类: Physics
通讯作者: Wang, TG , UNIV SCI & TECHNOL CHINA,CTR ASTROPHYS,HEFEI 230026,ANHUI,PEOPLES R CHINA.
部门归属: CHINESE CTR ADV SCI & TECHNOL,BEIJING 100080,PEOPLES R CHINA; CHINESE ACAD SCI,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA
英文摘要: Optical Fe II emission is a general characteristic of most active galactic nuclei, but the physical conditions in the Fe II-emitting region are not yet understood. The current photoionization models underpredict the total Fe II intensity as well as optical Fe II/H beta ratio. In this paper, we report the results of a statistical analysis of the relation between the optical Fe II strength from the literature and the UV spectra from IUE. We find that Fe II/H beta is strongly correlated with I(lambda 1400)/I(C IV) and I(C IV)/I(Ly alpha). The equivalent widths of optical Fe II and C IV are significantly anticorrelated. While no firm conclusions have been reached, the Fe II strength might be expected to be influenced by (1) the inclination of the accretion disk, (2) the spectrum of the ionizing continuum, and (3) the volume and column densities of the emission-line gas.
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12661
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Wang, TG,Zhou, YY,Gao, AS. Relations between the optical Fe II emission and ultraviolet spectra in active galactic nuclei[J]. ASTROPHYSICAL JOURNAL,1996,457(1):111-117.
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