The dynamical state of RX J1347.5−1145 from a combined strong lensing and X-ray analysis
The dynamical state of RX J1347.5−1145 from a combined strong lensing and X-ray analysis
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强透镜和 X 射线分析相结合得出的 RX J1347.5−1145 的动态状态
DOI：
10.1111/j.1365-2966.2008.12855.x
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发表时间：
2008
影响因子：
4.8
通讯作者：
M. Paolillo
中科院分区：
文献类型：
--
作者：
M. Miranda;Mauro Sereno;E. D. Filippis;M. Paolillo
我们对RX J1347.5−1145进行了X射线和强透镜分析，RX J1347.5−1145是X射线波长下最明亮的星系团之一。我们表明，强透镜单独的证据，根据已公布的甚大望远镜（VLT）和新的哈勃太空望远镜（HST）的数据，强烈主张有利于一个复杂的结构。该分析考虑了弧的位置、形状和方向，并且在图像平面中完全完成。星系团内部区域的质量分布符合双峰分布，在半径为360 kpc h−1（1.5弧分）的范围内，总投影质量Mtot=（9.9 ± 0.3）× 1014 M h−1。这种复杂的结构可能是最近一次重大合并的标志，X射线数据进一步支持了这一点。根据钱德拉的深层观测，星团的温度图显示了位于第一个主要组成部分和东南部X射线发射子团之间的热锋。这张图还揭示了星团最内部区域的冷气体细丝，很可能是由冷核心区域内的cD运动引起的冷却尾流。两个暗物质子团在天空平面上的合并场景与我们的透镜和X射线分析一致，并且可以解释先前基于维里定理的质量估计的差异。
We perform a combined X-ray and strong lensing analysis of RX J1347.5−1145, one of the most luminous galaxy clusters at X-ray wavelengths. We show that evidence from strong lensing alone, based on published Very Large Telescope (VLT) and new Hubble Space Telescope (HST) data, strongly argues in favour of a complex structure. The analysis takes into account arc positions, shapes and orientations, and is done thoroughly in the image plane. The cluster inner regions are well fitted by a bimodal mass distribution, with a total projected mass of Mtot= (9.9 ± 0.3) × 1014 M⊙ h−1 within a radius of 360 kpc h−1 (1.5 arcmin). Such a complex structure could be a signature of a recent major merger as further supported by X-ray data. A temperature map of the cluster, based on deep Chandra observations, reveals a hot front located between the first main component and an X-ray emitting south-eastern subclump. The map also unveils a filament of cold gas in the innermost regions of the cluster, most probably a cooling wake caused by the motion of the cD inside the cool core region. A merger scenario in the plane of the sky between two dark matter subclumps is consistent with both our lensing and X-ray analyses, and can explain previous discrepancies with mass estimates based on the virial theorem.
利用高分辨率 Sunyaev-Zeldovich 效应图像和 X 射线数据探索团簇物理
DOI：
--
发表时间：
2004
期刊：
Publication of the Astronomical Society of Japan 56・1
影响因子：
--
作者：
Kitayama;T.et al.
通讯作者：
T.et al.