X-ray spectroscopy of the cluster of galaxies PKS 0745-191 with XMM-Newton

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	X-ray spectroscopy of the cluster of galaxies PKS 0745-191 with XMM-Newton
	Chen Y(陈勇); Chen, Y; Ikebe, Y; Bohringer, H
刊名	ASTRONOMY & ASTROPHYSICS
	2003
卷号	407 期号:1 页码:#REF!
关键词	X-rays : galaxies galaxies : clusters : individual : PKS 0745-191
通讯作者	Chen, Y (reprint author), Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, Beijing 100039, Peoples R China.
英文摘要	We present the results from XMM-Newton observations of the cluster of galaxies PKS 0745-191. The spatially resolved spectra from the European Photon Imaging Cameras ( both EPN and EMOS) can be fitted with a single temperature thermal plasma model when the interstellar column density is closer to the lower limit of the range allowed by observations. Alternatively, a two-component model can be fitted to the spectra from the inner region for slightly higher values of N-H. The temperature profile shows a drop in the center of the cluster, from about 8 keV at radii larger than similar to350 kpc to about 4 keV at the center, indicating that the gas in the central region is cooling. The total cooling flow rate inferred from the spectral data is only 364(-94)(+97) M-circle dot yr(-1), however, much smaller than the previously obtained value. The metal abundance is found to decrease from 0.5 in solar units at the center to about 0.2 at a radius of similar to300 kpc. Deprojected spectra are also presented, which show a result similar to the projected spectra. The location of the X-ray emission peak is also the site of extended radio emission. Inspection of the higher resolution Chandra image of the cluster shows enhanced X-ray emission about 3" west of the center where also the radio emission is elongated. We explore possible implications on the interaction between the radio lobes and the intracluster plasma. Assuming that the gas is in hydrostatic equilibrium with the cluster potential, we find a total mass of about 1.18 +/- 0.04 x 10(13) M-circle dot within the critical radius of the observed gravitational arc, which is a factor similar to2 lower, however, than that from optical lensing. We also calculated the gas mass fraction profile up to 0.63 r(vir) and obtained a mean gas mass fraction f(gas) = 0.22 +/- 0.02.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000184435000010
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225688]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Chen Y,Chen, Y,Ikebe, Y,et al. X-ray spectroscopy of the cluster of galaxies PKS 0745-191 with XMM-Newton[J]. ASTRONOMY & ASTROPHYSICS,2003,407(1):#REF!.
APA	陈勇,Chen, Y,Ikebe, Y,&Bohringer, H.(2003).X-ray spectroscopy of the cluster of galaxies PKS 0745-191 with XMM-Newton.ASTRONOMY & ASTROPHYSICS,407(1),#REF!.
MLA	陈勇,et al."X-ray spectroscopy of the cluster of galaxies PKS 0745-191 with XMM-Newton".ASTRONOMY & ASTROPHYSICS 407.1(2003):#REF!.