YNAO OpenIR  > 恒星物理研究组
Magnetic-reconnection-heated corona in active galactic nuclei: refined disc-corona model and application to broad-band radiation
Cheng, Huaqing1,2; Liu, B. F.1,2; Liu JY(刘杰英)3,4,5; Liu, Zhu1; Qiao, Erlin1,2; Yuan, Weimin1,2
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2020-06-01
卷号495期号:1页码:1158-1171
DOI10.1093/mnras/staa1250
产权排序第3完成单位
收录类别SCI
关键词accretion, accretion discs magnetic fields galaxies: active galaxies: nuclei
摘要

A long-standing question in active galactic nucleus (AGN) research is how the corona is heated up to produce X-ray radiation much stronger than that arising from the viscous heating within the corona. In this paper, we carry out detailed investigations of magnetic-reconnection heating to the corona, specifically, studying how the disc and corona are self-consistently coupled with the magnetic field, and how the emergent spectra depend on the fundamental parameters of AGN. It is shown that diverse spectral shapes and luminosities over a broad bandpass from optical to X-ray can be produced from the coupled disc and corona within a limited range of the black hole mass, accretion rate, and magnetic field strength. The relative strength of X-ray emission with respect to optical/ultraviolet (UV) depends on the strength of the magnetic field in the disc, which, together with accretion rate, determines the fraction of accretion energy transported and released in the corona. This refined disc-corona model is then applied to reproduce the broad-band spectral energy distributions (SEDs) of a sample of 20 bright local AGNs observed simultaneously in X-ray and optical/UV. We find that, in general, the overall observed broad-band SEDs can be reasonably reproduced, except for rather hard X-ray spectral shapes in some objects. The radiation pressure-dominant region, as previously predicted for the standard accretion disc in AGN, disappears for strong X-ray sources, revealing that AGN accretion discs are indeed commonly stable as observed. Our study suggests the disc-corona coupling model involving magnetic fields to be a promising approach for understanding the broad-band spectra of bright AGNs.

资助项目National Program on Key Research and Development Project[2016YFA0400804] ; National Natural Science Foundation of China[11673026] ; National Natural Science Foundation of China[11803047] ; National Natural Science Foundation of China[11773037] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23040100] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15310300] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052100] ; National Aeronautics and Space Administration
项目资助者National Program on Key Research and Development Project[2016YFA0400804] ; National Natural Science Foundation of China[11673026, 11803047, 11773037] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23040100] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15310300, XDA15052100] ; National Aeronautics and Space Administration
语种英语
学科领域天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS记录号WOS:000539101400087
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]X-RAY-SPECTRA ; ADVECTION-DOMINATED ACCRETION ; SEYFERT-GALAXIES ; BLACK-HOLES ; EMISSION ; ULTRAVIOLET ; TEMPERATURE ; REFLECTION ; TRANSITION ; VISCOSITY
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/23400
专题恒星物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Cheng, Huaqing; Liu, B. F.
作者单位1.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China
2.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, P. R. China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, P. R. China
5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, P. R. China
推荐引用方式
GB/T 7714
Cheng, Huaqing,Liu, B. F.,Liu JY,et al. Magnetic-reconnection-heated corona in active galactic nuclei: refined disc-corona model and application to broad-band radiation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,495(1):1158-1171.
APA Cheng, Huaqing,Liu, B. F.,Liu JY,Liu, Zhu,Qiao, Erlin,&Yuan, Weimin.(2020).Magnetic-reconnection-heated corona in active galactic nuclei: refined disc-corona model and application to broad-band radiation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,495(1),1158-1171.
MLA Cheng, Huaqing,et al."Magnetic-reconnection-heated corona in active galactic nuclei: refined disc-corona model and application to broad-band radiation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 495.1(2020):1158-1171.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Magnetic-reconnectio(909KB)期刊论文出版稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Cheng, Huaqing]的文章
[Liu, B. F.]的文章
[Liu JY(刘杰英)]的文章
百度学术
百度学术中相似的文章
[Cheng, Huaqing]的文章
[Liu, B. F.]的文章
[Liu JY(刘杰英)]的文章
必应学术
必应学术中相似的文章
[Cheng, Huaqing]的文章
[Liu, B. F.]的文章
[Liu JY(刘杰英)]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Magnetic-reconnection-heated corona in active galactic nuclei_ refined disc–corona model and application to broad-band radiation.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。