King Ghidorah Supercluster: Mapping the light and dark matter in a new supercluster at z = 0.55 using the subaru hyper suprime-cam
King Ghidorah Supercluster: Mapping the light and dark matter in a new supercluster at z = 0.55 using the subaru hyper suprime-cam
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王者基多拉超星系团：使用 subaru hyper suprime-cam 绘制 z = 0.55 处新超星系团中的光物质和暗物质
DOI：
10.1093/mnrasl/slac150
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发表时间：
2023
影响因子：
--
通讯作者：
Masayuki Tanaka
中科院分区：
文献类型：
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作者：
Rhythm Shimakawa;Nobuhiro Okabe;Masato Shirasaki;Masayuki Tanaka
本文报道了我们在超超素数-卡姆斯巴鲁战略计划(HSC-SSP PDR3)的第三次公开数据发布中发现的质量最大的超星系团，被称为吉多拉国王超星系团(KGSC)，atz=0.5-0.64，超过690 de2，以及星系和暗物质图谱的初步结果。KGSc的一级结构包括三个宽的弱透镜(WL)峰，超过70个共移动的MPC。目前，只有使用HSC-SSP产生的广域高质量图像，才能实现这样大范围的WL探测。该结构还与跨越∼400mpc移动尺度的多个大型结构相邻。整个磁场具有显著的红色序列星系团的过密度(δ=14.7%±44.5%)。此外，在视线的前景中可以发现大范围的低密度。根据基于大体积宇宙模拟的模拟数据分析，我们确认了恒星质量和暗物质分布中的超密度是紧密耦合的，并估计主结构的总质量为1×1016个太阳质量。此外，即将到来的广域多目标光谱仪，如斯巴鲁主聚焦光谱仪，可能有助于提供对100 MPC尺度以外的遥远超星系团的更多洞察。
This paper reports our discovery of the most massive supercluster, termed the King Ghidorah Supercluster (KGSc), atz= 0.50–0.64 in the Third Public Data Release of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP PDR3) over 690 deg2, as well as an initial result for a galaxy and dark matter mapping. The primary structure of the KGSc comprises triple broad weak-lensing (WL) peaks over 70 comoving Mpc. Such extensive WL detection atz> 0.5 can only currently be achieved using the wide-field high-quality images produced by the HSC-SSP. The structure is also contiguous with multiple large-scale structures across a ∼400 comoving Mpc scale. The entire field has a notable overdensity (δ = 14.7 ± 4.5) of red-sequence clusters. Additionally, large-scale underdensities can be found in the foreground along the line of sight. We confirmed the overdensities in stellar mass and dark matter distributions to be tightly coupled and estimated the total mass of the main structure to be 1 × 1016solar masses, according to the mock data analyses based on large-volume cosmological simulations. Further, upcoming wide-field multi-object spectrographs such as the Subaru Prime Focus Spectrograph may aid in providing additional insights into distant superclusters beyond the 100 Mpc scale.