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arXiv 1004.0093astro-ph.CO
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XMMU J100750 .5+125818:z=1.082的强透镜团簇

XMMU J100750.5+125818: A strong lensing cluster at z=1.082

A. D. Schwope, G. Lamer, A. de Hoon, J. Kohnert, H. Boehringer, J. P. Dietrich, R. Fassbender, J. Mohr, M. Muehlegger, D. Pierini, G. W. Pratt, H. Quintana, P. … 展开作者

A. D. Schwope, G. Lamer, A. de Hoon, J. Kohnert, H. Boehringer, J. P. Dietrich, R. Fassbender, J. Mohr, M. Muehlegger, D. Pierini, G. W. Pratt, H. Quintana, P. Rosati, J. Santos, R. Suhada

摘要:

本文报道了X射线发光星系团XMMU J100750.5+125818的19个光谱成员的发现,它具有较强的透镜效应。SED模型的透镜弧的功能,从VLT和LBT成像显示可能的红移~2.7的最突出的透镜背景星系。根据星系团成员的速度色散、X射线光谱参数和最大透镜弧M_SL ~ 2.3 × 10 ^{13} Msun,对不同半径的星系团进行了质量估算,得到了M_200 ~ 1.8 × 10 ^{14} Msun。星系团的投影空间分布似乎是拉长的,最亮的星系偏离了X射线发射的中心,这表明它的结构还没有放松。XMMU J100750.5+125818提供了一个遥远的星系团的内部质量分布与强和弱透镜,光学和X射线光谱学的组合优秀的诊断。

英文摘要:

We report on the discovery of the X-ray luminous cluster XMMU J100750.5+125818 at redshift 1.082 based on 19 spectroscopic members, which displays several strong lensing features. SED modeling of the lensed arc features from multicolor imaging with the VLT and the LBT reveals likely redshifts ~2.7 for the most prominent of the lensed background galaxies. Mass estimates are derived for different radii from the velocity dispersion of the cluster members, M_200 ~ 1.8 10^{14} Msun, from the X-ray spectral parameters, M_500 ~ 1.0 10^{14} Msun, and the largest lensing arc, M_SL ~ 2.3 10^{13} Msun. The projected spatial distribution of cluster galaxies appears to be elongated, and the brightest galaxy lies off center with respect to the X-ray emission indicating a not yet relaxed structure. XMMU J100750.5+125818 offers excellent diagnostics of the inner mass distribution of a distant cluster with a combination of strong and weak lensing, optical and X-ray spectroscopy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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