EVIDENCE FOR AN INTERMEDIATE LINE REGION IN ACTIVE GALACTIC NUCLEI's INNER TORUS REGION AND ITS EVOLUTION FROM NARROW TO BROAD LINE SEYFERT I GALAXIES

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	EVIDENCE FOR AN INTERMEDIATE LINE REGION IN ACTIVE GALACTIC NUCLEI's INNER TORUS REGION AND ITS EVOLUTION FROM NARROW TO BROAD LINE SEYFERT I GALAXIES
	Zhu, L; Zhang SN(张双南); Zhang, SN; Tang, SM
刊名	ASTROPHYSICAL JOURNAL
	2009
卷号	700 期号:2 页码:1173-1189
关键词	galaxies: active galaxies: nuclei galaxies: structure Galaxy: evolution line: profiles quasars: emission lines
通讯作者	[Zhu, Ling ; Zhang, Shuang Nan] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China ; [Zhu, Ling ; Zhang, Shuang Nan] Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China ; [Zhang, Shuang Nan] Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Zhang, Shuang Nan] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA ; [Tang, Sumin] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
英文摘要	A two-component model for the broad-line region (BLR) of active galactic nuclei (AGNs) has been suggested for many years but not widely accepted. This model indicates that the broad line can be described with the superposition of two Gaussian components (very broad Gaussian component and intermediate Gaussian component (IMGC)) which are from two physically distinct regions, i.e., very broad line region (VBLR) and intermediate line region. We select a Sloan Digital Sky Survey sample to further confirm this model and give a detailed analysis of the geometry, density, and evolution of these two regions. The microlensing result of the BLR in J1131-1231 and some unexplained phenomena in reverberation mapping (RM) experiment provide supportive evidence for this model. Our results indicate that the radius obtained from the emission line RM normally corresponds to the radius of the VBLR, and the existence of the IMGC may affect the measurement of the black hole masses in AGNs. The deviation of NLS1s from the M-sigma relation and the type II AGN fraction as a function of luminosity can be explained in this model in a coherent way. The evolution of the two emission regions may be related to the evolutionary stages of the BLRs of AGNs from NLS1s to BLS1s. Based on the results presented here, a unified picture of the hierarchical evolution of a black hole, a dust torus, and a galaxy is proposed.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000268098100028
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/239143]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhu, L,Zhang SN,Zhang, SN,et al. EVIDENCE FOR AN INTERMEDIATE LINE REGION IN ACTIVE GALACTIC NUCLEI's INNER TORUS REGION AND ITS EVOLUTION FROM NARROW TO BROAD LINE SEYFERT I GALAXIES[J]. ASTROPHYSICAL JOURNAL,2009,700(2):1173-1189.
APA	Zhu, L,张双南,Zhang, SN,&Tang, SM.(2009).EVIDENCE FOR AN INTERMEDIATE LINE REGION IN ACTIVE GALACTIC NUCLEI's INNER TORUS REGION AND ITS EVOLUTION FROM NARROW TO BROAD LINE SEYFERT I GALAXIES.ASTROPHYSICAL JOURNAL,700(2),1173-1189.
MLA	Zhu, L,et al."EVIDENCE FOR AN INTERMEDIATE LINE REGION IN ACTIVE GALACTIC NUCLEI's INNER TORUS REGION AND ITS EVOLUTION FROM NARROW TO BROAD LINE SEYFERT I GALAXIES".ASTROPHYSICAL JOURNAL 700.2(2009):1173-1189.