论文标题
X射线（classix）集群调查IV中的宇宙大规模结构IV：z <= 0.03的本地宇宙中的超级集体器
The Cosmic Large-Scale Structure in X-rays (CLASSIX) cluster survey IV: Superclusters in the local Universe at z <= 0.03
论文作者
论文摘要
重要的是要在宇宙学研究中绘制本地宇宙中的大规模物质分布，例如追踪大规模奇特速度流，环境对不同天文对象的表征以及宇宙学参数的精确测量。我们使用X射线发光簇来映射此物质分布，发现大约51％的组和簇是超级群体的成员，仅占体积的百分之几。在本文中，我们提供了这些大规模结构的详细描述。有了朋友与朋友的算法，我们发现八个超密度比率至少两个的超级散布器，其中五个或更多的星系组和群集成员在宇宙体积中占据z = 0.03。最突出的四个是Perseus -pisces，Centaurus，Coma和Hercules Supercluster，长度从约40至100 MPC，估计为0.6-2.2 10^16 MSUN。这些结构中最大的是Perseus-Pisces超集群。这四个较小的超级集团包括射手座和拉克塔尔星座中的本地和Abell 400超级收集器以及两个超级集体。我们提供了八个超级散布器的详细地图，成员目录和物理描述。通过构建具有不同X射线光度限制的一系列群集子样本的超级集群，我们表明主要结构始终可靠地恢复。
It is important to map the large-scale matter distribution in the local Universe for cosmological studies, such as the tracing of the large-scale peculiar velocity flow, the characterisation of the environment for different astronomical objects, and for precision measurements of cosmological parameters. We used X-ray luminous clusters to map this matter distribution and find that about 51% of the groups and clusters are members of superclusters which occupy only a few percent of the volume. In this paper we provide a detailed description of these large-scale structures. With a friends-to-friends algorithm, we find eight superclusters with a cluster overdensity ratio of at least two with five or more galaxy group and cluster members in the cosmic volume out to z = 0.03. The four most prominent ones are the Perseus-Pisces, the Centaurus, the Coma, and the Hercules supercluster, with lengths from about 40 to over 100 Mpc and estimated masses of 0.6 - 2.2 10^16 Msun. The largest of these structures is the Perseus-Pisces supercluster. The four smaller superclusters include the Local and the Abell 400 supercluster and two superclusters in the constellations Sagittarius and Lacerta. We provide detailed maps, member catalogues, and physical descriptions of the eight superclusters. By constructing superclusters with a range of cluster sub-samples with different lower X-ray luminosity limits, we show that the main structures are always reliably recovered.
