A direct comparison of X-ray spectral models for tori in active galactic nuclei

	A direct comparison of X-ray spectral models for tori in active galactic nuclei
	Liu Y(刘元); Li XB(李晓波); Liu, Y; Li, XB
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2015
卷号	448 期号:1 页码:L53-L57
关键词	radiative transfer galaxies: active X-rays: galaxies
通讯作者	刘元 ; 李晓波
英文摘要	Several X-ray spectral models for tori in active galactic nuclei (AGNs) are available to constrain the properties of tori; however, the accuracy of these models has not been verified. We recently constructed a code for the torus using GEANT4, which can easily handle different geometries. Thus, we adopt the same assumptions as Murphy & Yaqoob (2009, MNRAS, 397, 1549) and Brightman & Nandra (2011, MNRAS, 413, 1206) and try to reproduce their spectra. As a result, we can reproduce well the reflection spectra and the strength of the Fe K alpha line of Murphy & Yaqoob, for both N-H = 10(24) and 10(25) cm(-2). However, we cannot produce the strong reflection component of Brightman & Nandra in the low-energy band. The origin of this component is the reflection from the visible inner wall of the torus, and the reflection should be very weak in the edge-on directions under the geometry of Brightman & Nandra. Therefore, the behaviour of the reflection spectra in Brightman & Nandra is not consistent with their geometry. The strength of the Fe K alpha line of Brightman & Nandra is also different from our results and the analytical result in the optically thin case. The limitation of the spectral model will bias the parameters from the X-ray spectral fitting.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000354386000012
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228556]
专题	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. A direct comparison of X-ray spectral models for tori in active galactic nuclei[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,448(1):L53-L57.
APA	刘元,李晓波,Liu, Y,&Li, XB.(2015).A direct comparison of X-ray spectral models for tori in active galactic nuclei.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,448(1),L53-L57.
MLA	刘元,et al."A direct comparison of X-ray spectral models for tori in active galactic nuclei".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 448.1(2015):L53-L57.