On the emitting region of X-ray fluorescent lines around Compton-thick AGN

	On the emitting region of X-ray fluorescent lines around Compton-thick AGN
	Liu, Jiren
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-06-11
卷号	459 期号:1 页码:L105-L108
关键词	atomic processes galaxies: individual: Circinus, Mrk 3, NGC 1068 galaxies: Seyfert X-rays: galaxies
英文摘要	X-ray fluorescent lines are unique features of the reflection spectrum of the torus when irradiated by the central active galactic nuclei (AGN). Their intrinsic line width can be used to probe the line-emitting region. Previous studies have focused on the Fe K alpha line at 6.4 keV, which is the most prominent fluorescent line. These studies, however, are limited by the spectral resolution of currently available instruments, the best of which is similar to 1860 km s(-1) afforded by the Chandra High-Energy Grating (HEG). The HEG spectral resolution is improved by a factor of 4 at 1.74 keV, where the Si K alpha line is located. We measured the full width at half-maximum of the Si K alpha line for Circinus, Mrk 3, and NGC 1068, which are 570 +/- 240, 730 +/- 320, and 320 +/- 280 km s(-1), respectively. They are 3-5 times smaller than those measured with the Fe Ka line previously. It shows that the intrinsic widths of the Fe K alpha line are most likely to be overestimated. The measured widths of the Si K alpha line put the line-emitting region outside the dust sublimation radius in these galaxies. It indicates that for Compton-thick AGN, the X-ray fluorescence material are likely to be the same as the dusty torus emitting in the infrared band.
收录类别	SCI
语种	英语
WOS记录号	WOS:000376388000022
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5384]
专题	国家天文台_星系宇宙学研究部
作者单位	Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jiren. On the emitting region of X-ray fluorescent lines around Compton-thick AGN[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,459(1):L105-L108.
APA	Liu, Jiren.(2016).On the emitting region of X-ray fluorescent lines around Compton-thick AGN.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,459(1),L105-L108.
MLA	Liu, Jiren."On the emitting region of X-ray fluorescent lines around Compton-thick AGN".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.1(2016):L105-L108.