Diagnosing the Kinematics of the Tori in Active Galactic Nuclei with the Velocity-resolved Reverberation Mapping of the Narrow Iron K alpha Line

doi:10.3847/2041-8213/aa7e7e

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	Diagnosing the Kinematics of the Tori in Active Galactic Nuclei with the Velocity-resolved Reverberation Mapping of the Narrow Iron K alpha Line
	Liu Y(刘元); Li XB(李小波); Liu, Y; Li, XB
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2017
卷号	844 期号:1 页码:L8
关键词	galaxies: Seyfert radiative transfer X-rays: galaxies
ISSN号	2041-8205
DOI	10.3847/2041-8213/aa7e7e
文献子类	Article
英文摘要	The properties of the dusty tori in active galactic nuclei (AGNs) have been investigated in detail, mainly focusing on the geometry and components; however, the kinematics of the torus are still not clear. The narrow iron K alpha line at 6.4 keV is thought to be produced by the X-ray reflection from the torus. Thus, the velocity-resolved reverberation mapping of it is able to constrain the kinematics of the torus. Such effort is limited by the spectral resolution of current charged coupled device (CCD) detectors and should be possible with the microcalorimeter on the next generation X-ray satellite. In this paper, we first construct the response functions of the torus under a uniform inflow, a Keplerian rotation, and a uniform outflow. Then the energy-dependent light curve of the narrow iron K alpha line is simulated according to the performance of the X-ray Integral Field Unit in Athena. Finally, the energy-dependent cross-correlation function is calculated to reveal the kinematic signal. According to our results, 100 observations with 5 ks exposure of each are sufficient to distinguish the above three velocity fields. Although the real geometry and velocity field of the torus could be more complex than we assumed, the present result proves the feasibility of the velocity-resolved reverberation mapping of the narrow iron K alpha line. The combination of the dynamics of the torus with those of the broad-line region and the host galaxy is instructive for the understanding of the feeding and feedback process of AGNs.
电子版国际标准刊号	2041-8213
WOS关键词	AGN MONITORING PROJECT ; RAY SPECTRAL MODEL ; SEYFERT-GALAXIES ; NGC 4151 ; BLACK-HOLE ; HOT DUST ; REGION ; CIRCUMNUCLEAR ; VARIABILITY ; EMISSION
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000406027700001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284712]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Liu Y,Li XB,Liu, Y,et al. Diagnosing the Kinematics of the Tori in Active Galactic Nuclei with the Velocity-resolved Reverberation Mapping of the Narrow Iron K alpha Line[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,844(1):L8.
APA	刘元,李小波,Liu, Y,&Li, XB.(2017).Diagnosing the Kinematics of the Tori in Active Galactic Nuclei with the Velocity-resolved Reverberation Mapping of the Narrow Iron K alpha Line.ASTROPHYSICAL JOURNAL LETTERS,844(1),L8.
MLA	刘元,et al."Diagnosing the Kinematics of the Tori in Active Galactic Nuclei with the Velocity-resolved Reverberation Mapping of the Narrow Iron K alpha Line".ASTROPHYSICAL JOURNAL LETTERS 844.1(2017):L8.