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The analysis of Abell 1835 using a deprojection technique
Jia SM(贾淑梅); Chen Y(陈垚); Lu FJ(卢方军); Chen; L.; Xiang F(向飞); Jia, SA; Chen, Y; Lu, FJ; Chen, L; Xiang, F
2004
发表期刊ASTRONOMY & ASTROPHYSICS
卷号423期号:1页码:#REF!
通讯作者Jia, SA (reprint author), Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, Beijing 100039, Peoples R China.
文章类型Article
摘要We present the results from a detailed deprojection analysis of Abell 1835 as observed by XMM-Newton. If we fit the spectra with an isothermal plasma model, the deprojected temperature profile is flat in the outer region around 7.6 keV and decreases to similar to5.6 keV in the center, which may be connected with the gas cooling. In the central part, a two-component thermal plasma model can fit the spectrum significantly better. Moreover, the cool component (T similar to 1.8 keV) has a much lower metal abundance than the hot component (T similar to 8 keV), which may be due to the longer cooling time for the cool gas with lower abundance. In addition, it was found that without a main isothermal component, the standard cooling flow model cannot fit the spectrum satisfactorily. From the isothermal model fitting results we also derived the electron density n(e), and fitted its radial distribution with a double-beta model. The n(e) profile inferred with the double-beta model and the deprojected X-ray gas temperature profile were then combined to derive the total mass and the total projected mass of the cluster. The projected mass is lower than that derived from the weak lensing method. However, assuming that the cluster extends to a larger radius similar to 15' as found by Clowe & Schneider (2002), the two results are consistent within the error bars. Furthermore, we calculated the projected mass within the radius of similar to153 kpc implied by the presence of a gravitational lensing arc, which is about half of the mass determined from the optical lensing.
关键词galaxies : clusters : individual : Abell 1835 X-rays : galaxies
学科领域Astronomy & Astrophysics
DOI10.1051/0004-6361:20034006
收录类别SCI
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000223473000009
引用统计
被引频次:13[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/311005/225879
专题粒子天体物理中心
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Jia SM,Chen Y,Lu FJ,et al. The analysis of Abell 1835 using a deprojection technique[J]. ASTRONOMY & ASTROPHYSICS,2004,423(1):#REF!.
APA 贾淑梅.,陈垚.,卢方军.,Chen.,L..,...&Xiang, F.(2004).The analysis of Abell 1835 using a deprojection technique.ASTRONOMY & ASTROPHYSICS,423(1),#REF!.
MLA 贾淑梅,et al."The analysis of Abell 1835 using a deprojection technique".ASTRONOMY & ASTROPHYSICS 423.1(2004):#REF!.
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