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Narrow iron Ka lines in active galactic nuclei: Evolving populations?
Zhou XL(周新霖); Wang JM(王建民); Zhou, XL; Wang, JM
2005
发表期刊ASTROPHYSICAL JOURNAL
卷号618期号:2页码:L83-L86
通讯作者Chinese Acad Sci, Inst High Energy Phys, High Energy Astrophys Lab, Beijing 100039, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
文章类型Article
摘要We assemble a sample consisting of 66 active galactic nuclei (AGNs) from the literature and from the XMM-Newton archive in order to investigate the origin of the 6.4 keV narrow iron Kalpha line (NIKAL). The X-ray Baldwin effect of the NIKAL is confirmed in this sample. We find that the equivalent width (EW) of the NIKAL is more strongly inversely correlated with the Eddington ratio (epsilon) than with the 2-10 keV X-ray luminosity. Our sample favors the dusty torus origin, with the X-ray Baldwin effect being caused by the changing opening angle of the dusty torus. The EW-epsilon relation can be derived from a toy model of the dusty torus. If the unification scheme is valid in all AGNs, we can derive the Baldwin effect from the ratio of type II AGNs to the total population given by Chandra and Hubble Space Telescope deep surveys. Thus, the evolution of populations could be reflected in the NIKAL's Baldwin effect.
关键词galaxies : active line : profiles
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/427871
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000226294000006
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被引频次:73[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240303
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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Zhou XL,Wang JM,Zhou, XL,et al. Narrow iron Ka lines in active galactic nuclei: Evolving populations?[J]. ASTROPHYSICAL JOURNAL,2005,618(2):L83-L86.
APA 周新霖,王建民,Zhou, XL,&Wang, JM.(2005).Narrow iron Ka lines in active galactic nuclei: Evolving populations?.ASTROPHYSICAL JOURNAL,618(2),L83-L86.
MLA 周新霖,et al."Narrow iron Ka lines in active galactic nuclei: Evolving populations?".ASTROPHYSICAL JOURNAL 618.2(2005):L83-L86.
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