Deprojected analysis of Abell 1835 observed with Chandra and compared with XMM-Newton

Deprojected analysis of Abell 1835 observed with Chandra and compared with XMM-Newton
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用 Chandra 观察到的 Abell 1835 的反投影分析并与 XMM-Newton 进行比较

DOI:
10.1051/0004-6361/201118578
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发表时间:
2012-08
期刊:
Astronomy & Astrophysics
影响因子:
--
通讯作者:
Zhao H.H.
Zhao H.H.
中科院分区:
其他
文献类型:
--
作者:
Li C.K.;Jia S.M.;Chen Y.;Xiang F.;Wang Y.S.;Zhao H.H.

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利用反投影技术,我们研究了星系团阿贝尔1835钱德拉观测的X射线性质,包括温度,丰度,电子密度,气体质量分数,和总质量。与不带解投影的结果比较表明,性质变化不大。当我们将结果与XMM-Newton的结果进行比较时,即使修正了XMM-Newton的点扩散函数效应,由Chandra和XMM-Newton数据得到的温度分布之间的差异仍然存在。为了研究差异的原因,我们使用光谱来交叉校准温度。结果表明,Chandra谱可以很好地与XMM-牛顿温度拟合。此外,我们从Chandra数据与XMM-牛顿温度导出的电子密度分布和计算的投影质量,这是一致的XMM-牛顿质量和略低于弱透镜质量在r(500)。因此,似乎从XMM-牛顿导出的温度可能更可靠。
Using a deprojection technique, we study the X-ray properties of the galaxy cluster Abell 1835 observed with Chandra, including temperature, abundance, electron density, gas mass fraction, and total mass. A comparison with the results without deprojection shows that the properties do not change much. When we compare the results with those of XMM-Newton, the difference between the temperature profiles derived from Chandra and XMM-Newton data still exists, even if the point-spread function effect of XMM-Newton is corrected. To investigate the reasons for the difference, we used the spectra to cross-calibrate the temperatures. They show that the Chandra spectra can be fitted well with XMM-Newton temperatures. Furthermore, we derive the electron density profile from Chandra data with XMM-Newton temperatures and calculate the projected mass, which is consistent with the XMM-Newton mass and a little lower than the weak lensing mass at r(500). Thus, it seems that the temperature derived from XMM-Newton may be more reliable.
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