论文标题
在$ z \ sim 1.1 $中发现超集团候选人
Discovery of a supercluster candidate at $z \sim 1.1$
论文作者
论文摘要
我们报告了Dark Energy调查科学验证数据中Z $ \ sim 1.1 $的遥远超级群落的有前途的候选人。我们检查了各种照片Z切片中平滑的半星系密度图。在几个过度密度的地区中，在这项工作中，我们报告最重要的是，在$ \ sim160 $ mpc量表上，红移的$3σ$过重，比常规集群量表（几个MPC）大得多。超收集器的形状在天空投影中不是圆形。因此，我们将最大过度密度的点视为定量测量中心。两个不同的估计值表明，超集群的质量为$ 1.37 \替换{+1.31 \\ -0.79} \ times 10^{17} m _ {\ odot} $，比常规星系簇要大于一个订单。除了发现具有发射线星系的原始植物外，这可能是正常星系定义的最遥远的超集群。光谱学的确认将使这成为宇宙学非常有趣的对象。我们讨论了这种巨大结构对$λ$ CDM宇宙学的可能含义。
We report a promising candidate for a distant supercluster at z $\sim 1.1$ in the Dark Energy Survey Science Verification data. We examine smoothed semi-3D galaxy density maps in various photo-z slices. Among several overdense regions, in this work we report the most significant one as having a $3σ$ overdensity at a redshift of $\sim1.1$, over a $\sim160$ Mpc scale, much larger than the regular cluster scale (several Mpc). The shape of the supercluster is not circular in the sky projection. Therefore, we regard the point of maximum overdensity as the center for quantitative measurements. Two different estimates suggest the mass of the supercluster to be $1.37\substack{+1.31 \\ -0.79} \times 10^{17} M_{\odot}$, more than one order more massive than regular galaxy clusters. Except for protosuperclusters found with emission-line galaxies, this could be the most distant supercluster to date defined by regular galaxies. A spectroscopic confirmation would make this a very interesting object for cosmology. We discuss the possible implications of such a massive structure for $Λ$CDM cosmology.
