Relativistic Fe K alpha line in the composite X-ray spectra of radio-loud active galactic nuclei

doi:10.1093/mnras/stz2030

CORC > 国家天文台 > 中国科学院国家天文台

	Relativistic Fe K alpha line in the composite X-ray spectra of radio-loud active galactic nuclei
	Hu, Jingwei 1,2; Liu, Zhu 1; Jin, Chichuan 1; Yuan, Weimin 1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-09-01
卷号	488 期号:3 页码:4378-4388
关键词	line: profiles galaxies: active galaxies: jets X-rays: galaxies
ISSN号	0035-8711
DOI	10.1093/mnras/stz2030
英文摘要	While a broad Fe K alpha emission line is generally found in the X-ray spectra of radio quiet (RQ) active galactic nuclei (AGNs), this feature, commonly thought to be broadened by the relativistic effects near the central black hole, appears to be rare in their radio loud (RL) counterparts. In this paper, we carry out a detailed study of the ensemble property of the X-ray spectra, focusing on the Fe line, of 97 RL AGNs by applying the spectral stacking method to the spectra obtained with XMM-Newton. For comparison, the same analysis is also performed for 193 RQ AGNs. Both a narrow and a broad component of the Fe K alpha, line are detected at high significance in the stacked spectra of both samples. The broad lines can be well fitted with relativistically broadened line profiles. Our results suggest that, as in their RQ counterparts, a relativistic Fe line component is commonly present in RI, AGNs, though it may not be detected unambiguously in individual objects with spectra of relatively low signal to noise. We try to constrain the average spin of the black holes for both the RL and RQ AGN samples by modelling their composite Fe line spectral profiles with relativistic disc line models. For the RI, sample, the average spin is loosely constrained and a wide range is allowed except for very fast spins (<0.78, 90 per cent confidence), while for the RQ sample, it is constrained to be low or moderate (<0.24). We conclude that the more precise measurement of the black hole spins in RL AGNs has to await for the advent of future high-throughput X-ray telescopes.
资助项目	National Natural Science Foundation of China[11873054] ; National Natural Science Foundation of China[11773037] ; National Natural Science Foundation of China[11673026] ; National Natural Science Foundation of China[11473035] ; thegravitational wave pilot B[XDB23040100] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15310300] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052100] ; ESA Member States ; USA (NASA)
WOS关键词	BLACK-HOLE SPIN ; SEYFERT 1 GALAXIES ; BROAD IRON LINES ; OBSERVATIONAL EVIDENCE ; ACCRETION DISKS ; EMISSION-LINES ; EXTRACTION ; ENERGY ; JETS ; FEATURES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000485158400103
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; thegravitational wave pilot B ; thegravitational wave pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; ESA Member States ; ESA Member States ; USA (NASA) ; USA (NASA) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; thegravitational wave pilot B ; thegravitational wave pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; ESA Member States ; ESA Member States ; USA (NASA) ; USA (NASA) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; thegravitational wave pilot B ; thegravitational wave pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; ESA Member States ; ESA Member States ; USA (NASA) ; USA (NASA) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; thegravitational wave pilot B ; thegravitational wave pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; ESA Member States ; ESA Member States ; USA (NASA) ; USA (NASA)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27761]
专题	中国科学院国家天文台
通讯作者	Hu, Jingwei; Liu, Zhu
作者单位	1.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hu, Jingwei,Liu, Zhu,Jin, Chichuan,et al. Relativistic Fe K alpha line in the composite X-ray spectra of radio-loud active galactic nuclei[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,488(3):4378-4388.
APA	Hu, Jingwei,Liu, Zhu,Jin, Chichuan,&Yuan, Weimin.(2019).Relativistic Fe K alpha line in the composite X-ray spectra of radio-loud active galactic nuclei.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,488(3),4378-4388.
MLA	Hu, Jingwei,et al."Relativistic Fe K alpha line in the composite X-ray spectra of radio-loud active galactic nuclei".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 488.3(2019):4378-4388.