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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0909.3163astro-ph.CO
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光谱证实了z=0.55的巨大宇宙结构

The spectroscopically confirmed huge cosmic structure at z=0.55

M. Tanaka, A. Finoguenov, T. Kodama, Y. Koyama, B. Maughan, F. Nakata

摘要:

我们报告的一个巨大的宇宙结构的光谱确认CL0016集群在z=0.55。我们对星系团周围区域进行了宽视场成像观测,并在星系团红移附近发现了30多个红色星系的聚集。对该结构最突出部分的后续光谱观测证实了14个接近星系团红移的系统,其中大约一半具有动态绑定到星系团的正概率。我们还进行了X射线跟踪,在X射线测量区域中,70%的系统都探测到了扩展的X射线发射。观测到的结构是遥远宇宙中观测到的最丰富的结构之一。这将是一个理想的网站量化环境变化的星系性质和影响的大尺度结构对星系的演变。

英文摘要:

We report on the spectroscopic confirmation of a huge cosmic structure around the CL0016 cluster at z=0.55. We made wide-field imaging observations of the surrounding regions of the cluster and identified more than 30 concentrations of red galaxies near the cluster redshift. The follow-up spectroscopic observations of the most prominent part of the structure confirmed 14 systems close to the cluster redshift, roughly half of which have a positive probability of being bound to the cluster dynamically. We also made an X-ray follow-up, which detected extended X-ray emissions from 70% of the systems in the X-ray surveyed region. The observed structure is among the richest ever observed in the distant Universe. It will be an ideal site for quantifying environmental variations in the galaxy properties and effects of large-scale structure on galaxy evolution.

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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