Measuring the Virial Factor in SDSS DR7 Active Galactic Nuclei with Redshifted Hβ and Hα Broad Emission Lines

doi:10.3847/1538-4357/ad1ab8

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	Measuring the Virial Factor in SDSS DR7 Active Galactic Nuclei with Redshifted Hβ and Hα Broad Emission Lines
	Liu HT(刘洪涛)1,3,4; Feng HC(封海成)1,3,4; Li SS(李莎莎)1,3,4; Bai JM(白金明)1,3,4; Li, H. Z.2
刊名	ASTROPHYSICAL JOURNAL
	2024-03-01
卷号	963 期号:1
ISSN号	0004-637X
DOI	10.3847/1538-4357/ad1ab8
产权排序	第1完成单位
文献子类	Article
英文摘要	Under the hypothesis of gravitational redshift induced by the central supermassive black hole and based on line widths and shifts of redward-shifted H beta and H alpha broad emission lines for more than 8000 Sloan Digital Sky Survey DR7 active galactic nuclei (AGNs), we measure the virial factor in determining supermassive black hole masses. The virial factor had been believed to be independent of accretion radiation pressure on gas clouds in broad-line regions (BLRs) and only dependent on the inclination effects of BLRs. The virial factor measured spans a very large range. For the vast majority of AGNs (>96%) in our samples, the virial factor is larger than the f = 1 usually used in the literature. The f-correction makes the percent of high-accreting AGNs decrease by about 100 times. There are positive correlations of f with the dimensionless accretion rate and Eddington ratio. The redward shifts of H beta and H alpha are mainly of gravitational origin, confirmed by a negative correlation between the redward shift and the dimensionless radius of the BLR. Our results show that radiation pressure force is a significant contributor to the measured virial factor, containing the inclination effects of the BLR. The usually used values of f should be corrected for high-accreting AGNs, especially high-redshift quasars. The f-correction increases their masses by 1-2 orders of magnitude, which will make it more challenging to explain the formation and growth of supermassive black holes at high redshifts.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2021YFA1600404]; National Key R&D Program of China[12373018]; National Key R&D Program of China[12303022]; National Key R&D Program of China[12203096]; National Key R&D Program of China[12063005]; National Key R&D Program of China[11991051]; National Natural Science Foundation of China[202301AT070358]; National Natural Science Foundation of China[202301AT070339]; Yunnan Fundamental Research Projects; Yunnan Postdoctoral Research Foundation; Special Research Assistant Funding Project of Chinese Academy of Sciences[CMS-CSST-2021-A06]; China Manned Space Project; Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province (IRTSTYN)
WOS关键词	SUPERMASSIVE BLACK-HOLES ; HIGH ACCRETION RATES ; REVERBERATION MAPPING MEASUREMENTS ; SPECTROSCOPIC CAMPAIGN ; COSMOLOGICAL EVOLUTION ; RADIATION PRESSURE ; MASS DETERMINATION ; QUASARS ; REGION ; AGN
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001177322700001
资助机构	MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2021YFA1600404] ; National Key R&D Program of China[12373018, 12303022, 12203096, 12063005, 11991051] ; National Natural Science Foundation of China[202301AT070358, 202301AT070339] ; Yunnan Fundamental Research Projects ; Yunnan Postdoctoral Research Foundation ; Special Research Assistant Funding Project of Chinese Academy of Sciences[CMS-CSST-2021-A06] ; China Manned Space Project ; Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province (IRTSTYN)
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26470]
专题	云南天文台_丽江天文观测站（南方基地）
作者单位	1.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China; 2.Physics Department, Yuxi Normal University, 134 Fenghuang Road, Hongta District, Yuxi 653100, Yunnan, People's Republic of China 3.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, Yunnan, People's Republic of China htliu@ynao.ac.cn, hcfeng@ynao.ac.cn; 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, Yunnan, People's Republic of China;
推荐引用方式 GB/T 7714	Liu HT,Feng HC,Li SS,et al. Measuring the Virial Factor in SDSS DR7 Active Galactic Nuclei with Redshifted Hβ and Hα Broad Emission Lines[J]. ASTROPHYSICAL JOURNAL,2024,963(1).
APA	刘洪涛,封海成,李莎莎,白金明,&Li, H. Z..(2024).Measuring the Virial Factor in SDSS DR7 Active Galactic Nuclei with Redshifted Hβ and Hα Broad Emission Lines.ASTROPHYSICAL JOURNAL,963(1).
MLA	刘洪涛,et al."Measuring the Virial Factor in SDSS DR7 Active Galactic Nuclei with Redshifted Hβ and Hα Broad Emission Lines".ASTROPHYSICAL JOURNAL 963.1(2024).