Magnetic-reconnection-heated corona model: implication of hybrid electrons for hard X-ray emission of luminous active galactic nuclei

doi:10.1093/mnras/stad3615

	Magnetic-reconnection-heated corona model: implication of hybrid electrons for hard X-ray emission of luminous active galactic nuclei
	Liu JY(刘杰英)2,3,4,5; Mao JR(毛基荣)2,3,4; Liu, B F 1,6
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2024-01
卷号	527 期号:3 页码:5627-5637
关键词	accretion, accretion discs magnetic fields galaxies: active galaxies: nuclei
ISSN号	0035-8711
DOI	10.1093/mnras/stad3615
产权排序	第1完成单位
文献子类	Article
英文摘要	It is widely accepted that X-ray emission in luminous active galactic nuclei (AGNs) originates from hot corona. To prevent the corona from overcooling by strong X-ray emission, steady heating to the corona is essential, for which the most promising mechanisms is the magnetic reconnection. Detailed studies of the coupled disc and corona, in the frame of magnetic field transferring accretion-released energy from the disc to the corona, reveal that the thermal electrons can only produce X-ray spectrum with Gamma(2-10) (keV) > 2.1, which is an inevitable consequence of the radiative coupling of the thermal corona and disc. In this work, we develop the magnetic-reconnection-heated corona model by taking into account the potential non-thermal electrons accelerated in the magnetic reconnection process, in addition to the thermal electrons. We show that the features of the structure and spectrum of the coupled disc and corona can be affected by the fraction of magnetic energy allocated to thermal electrons. Furthermore, we investigate the effects of the power-law index and energy range of non-thermal electrons and the magnetic field on the spectrum. It is found that the X-ray spectrum from the Comptonization of the hybrid electrons can be flatter than that from thermal electrons only, in agreement with observations. By comparing with the observed hard X-ray data, we suggest that a large fraction ( > 40 per cent) of the magnetic energy be allocated to the non-thermal electrons in the luminous and flat X-ray spectrum AGNs.
学科主题	天文学
URL标识	查看原文
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
资助项目	National Key R&D Program of China[2023YFE0101200]; National Key R&D Program of China[2021YFA1600402]; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000]; Natural Science Foundation of Yunnan Province[202201AT070158]; Yunnan Revitalization Talent Support Program Young Talent Project; National Natural Science Foundation of China[12073037]; National Natural Science Foundation of China[12333004]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; CSST[CMS-CSST-2021-A06]; Yunnan Revitalization Talent Support Program
WOS关键词	NONTHERMAL PARTICLE-ACCELERATION ; SUPERMASSIVE BLACK-HOLES ; PAIR PRODUCTION ; ACCRETION DISKS ; SPECTRA ; TURBULENCE ; RADIATION ; ORIGIN ; COMPTONIZATION ; POLARIZATION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:001131511000021
资助机构	National Key R&D Program of China[2023YFE0101200, 2021YFA1600402] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; Natural Science Foundation of Yunnan Province[202201AT070158] ; Yunnan Revitalization Talent Support Program Young Talent Project ; National Natural Science Foundation of China[12073037, 12333004] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; CSST[CMS-CSST-2021-A06] ; Yunnan Revitalization Talent Support Program
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26534]
专题	云南天文台_恒星物理研究组
作者单位	1.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, Yunnan Province, China; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China; 5.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, P. R. China; 6.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
推荐引用方式 GB/T 7714	Liu JY,Mao JR,Liu, B F. Magnetic-reconnection-heated corona model: implication of hybrid electrons for hard X-ray emission of luminous active galactic nuclei[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,527(3):5627-5637.
APA	刘杰英,毛基荣,&Liu, B F.(2024).Magnetic-reconnection-heated corona model: implication of hybrid electrons for hard X-ray emission of luminous active galactic nuclei.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,527(3),5627-5637.
MLA	刘杰英,et al."Magnetic-reconnection-heated corona model: implication of hybrid electrons for hard X-ray emission of luminous active galactic nuclei".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 527.3(2024):5627-5637.