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
学科分类Astronomy & Astrophysics
DOI10.1051/0004-6361:20030862
通讯作者Chen, Y (reprint author), Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, Beijing 100039, Peoples R China.
文章类型Article
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.
类目[WOS]Astronomy & Astrophysics
收录类别SCI
WOS记录号WOS:000184435000010
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被引频次:25[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225688
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
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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!.
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