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arXiv 1602.08498astro-ph.CO
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在$z \sim 0.47$发现大质量超星系团系统

Discovery of a massive supercluster system at $z \sim 0.47$

H. Lietzen, E. Tempel, L. J. Liivamägi, A. Montero-Dorta, M. Einasto, A. Streblyanska, C. Maraston, J. A. Rubiño-Martín, E. Saar

摘要:

超星系团是宇宙网中最大的相对独立的孤立系。利用SDSS BOSS巡天,我们寻找红移范围内最大的超星系团$0.43<z<0.71$。我们生成一个亮度密度场平滑过$8 h^{-1}\mathrm{Mpc}$检测大规模的过密度区域。每个单独的过密度区在调查中被定义为单个超星系团。我们定义的超星系团的方式,他们是在SDSS主调查中发现的超星系团可比。我们发现了一个我们称之为BOSS长城(BGW)的系统,它由直径为186和173 $h^{-1}$ Mpc的两个壁和另外两个直径为64和91 $h^{-1}$ Mpc的主要超星系团组成。作为一个整体,这个系统由830个星系组成,平均红移为0.47。我们估计总质量约为$2\times10^{17}h^{-1}M_\odot$。BGW系统中超星系团的形态与Sloan长城区的超星系团的形态相似。BGW是宇宙中发现的最大和最大的超星系团系统之一。

英文摘要:

Superclusters are the largest relatively isolated systems in the cosmic web. Using the SDSS BOSS survey we search for the largest superclusters in the redshift range $0.43<z<0.71$. We generate a luminosity-density field smoothed over $8 h^{-1}\mathrm{Mpc}$ to detect the large-scale over-density regions. Each individual over-density region is defined as single supercluster in the survey. We define the superclusters in the way that they are comparable with the superclusters found in the SDSS main survey. We found a system we call the BOSS Great Wall (BGW), which consists of two walls with diameters 186 and 173 $h^{-1}$Mpc, and two other major superclusters with diameters of 64 and 91 $h^{-1}$Mpc. As a whole, this system consists of 830 galaxies with the mean redshift 0.47. We estimate the total mass to be approximately $2\times10^{17}h^{-1}M_\odot$. The morphology of the superclusters in the BGW system is similar to the morphology of the superclusters in the Sloan Great Wall region. The BGW is one of the most extended and massive system of superclusters yet found in the Universe.

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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