Possible evidence of a universal radio/X-ray correlation in a near-complete sample of hard X-ray selected seyfert galaxies

doi:10.1093/mnras/stab521

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 星系宇宙学研究团组

	Possible evidence of a universal radio/X-ray correlation in a near-complete sample of hard X-ray selected seyfert galaxies
	Chang, N.7,8; Xie, F. G.6; Liu, X.5,8; Ho, L. C.3,4; Dong, A-J 2,8; Han, Z. H.1; Wang, X.7,8
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2021-05-01
卷号	503 期号:2 页码:1987-1998
关键词	accretion, accretion discs galaxies: active galaxies: Seyfert radio continuum: galaxies
ISSN号	0035-8711
DOI	10.1093/mnras/stab521
通讯作者	Chang, N.(changning@xao.ac.cn) ; Xie, F. G.(fgxie@shao.ac.cn) ; Liu, X.(liux@xao.ac.cn)
英文摘要	Because the disc-jet coupling likely depends on various properties of sources probed, the sample control is always an important but challenging task. In this work, we re-analysed the INTEGRAL hard X-ray-selected sample of Seyfert galaxies. We only consider sources that have measurements in black hole (BH) mass, and luminosities in radio and X-rays. Our final sample includes 64 (out of the original 79) sources, consists of both bright active galactic nucleus and low-luminosity ones. The 2-10 keV X-ray Eddington ratio L-X/L-Edd locates in the range between similar to 10(-4.5) and similar to 10(-0.5). We first find that, because of the similarity in the L-HX/L-X distribution, the X-ray origin of radio-loud Seyferts may be the same to that of radio-quiet (RQ) ones, where we attribute to the hot accretion flow (or similarly, the corona). We then investigate the connections between luminosities in radio and X-rays. Since our sample suffers a selection bias of a BH mass M-BH dependence on L-X/L-Edd, we focus on the correlation slope xi(X) between the radio (at 1.4 GHz) and X-ray luminosities in Eddington unit, i.e. . We classify the sources according to various properties, i.e. 1) Seyfert classification, 2) radio loudness, and 3) radio morphology. We find that, despite these differences in classification, all the sources in our sample are consistent with a universal correlation slope xi(X) (note that the normalization may be different), with xi(X) = 0.77 +/- 0.10. This is unexpected, considering various possible radio emitters in RQ systems. For the jet (either relativistic and well collimated, or sub-relativistic and weakly collimated) interpretation, our result may suggest a common/universal but to be identified jet launching mechanism among all the Seyfert galaxies, while properties like BH spin and magnetic field strength only play secondary roles. We further estimate the jet production efficiency eta(jet) of Seyfert galaxies, which is eta(jet) approximate to 1.9(-1.5)(+0.9) on average. We also find that eta(jet) increases as the system goes fainter. Alternative scenarios for the radio emission in RQ systems are also discussed.
资助项目	National Key Research and Development Program of China (NKRDC)[2018YFA0404602] ; Key Laboratory of Radio Astronomy, Chinese Academy of Sciences (CAS) ; National SKA Project of China[2020SKA0110102] ; National Science Foundation of China (NSFC)[11873074] ; Youth Innovation Promotion Association of CAS ; NSFC[11721303] ; NSFC[11991052] ; National Natural Science Foundation of China[U1831120] ; Science and Technology Foundation of Guizhou Province[[2019] 1241] ; Xinjiang Uygur Autonomous Region of China ; NASA ; NKRDC[2016YFA0400702]
WOS关键词	ACTIVE GALACTIC NUCLEI ; BLACK-HOLE-MASS ; FUNDAMENTAL PLANE ; JET POWER ; ACCRETION ; LUMINOSITY ; DISK ; EMISSION ; EFFICIENCY ; CONNECTION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000648999700029
资助机构	National Key Research and Development Program of China (NKRDC) ; Key Laboratory of Radio Astronomy, Chinese Academy of Sciences (CAS) ; National SKA Project of China ; National Science Foundation of China (NSFC) ; Youth Innovation Promotion Association of CAS ; NSFC ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Xinjiang Uygur Autonomous Region of China ; NASA ; NKRDC
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4188]
专题	星系宇宙学研究团组
通讯作者	Chang, N.; Xie, F. G.; Liu, X.
作者单位	1.Xinjiang Normal Univ, Phys & Elect Engn Dept, Urumqi 830000, Peoples R China 2.Guizhou Normal Univ, Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550001, Peoples R China 3.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 7.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 8.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Chang, N.,Xie, F. G.,Liu, X.,et al. Possible evidence of a universal radio/X-ray correlation in a near-complete sample of hard X-ray selected seyfert galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,503(2):1987-1998.
APA	Chang, N..,Xie, F. G..,Liu, X..,Ho, L. C..,Dong, A-J.,...&Wang, X..(2021).Possible evidence of a universal radio/X-ray correlation in a near-complete sample of hard X-ray selected seyfert galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,503(2),1987-1998.
MLA	Chang, N.,et al."Possible evidence of a universal radio/X-ray correlation in a near-complete sample of hard X-ray selected seyfert galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 503.2(2021):1987-1998.