The concordance cosmological model predicts that galaxy clusters grow at the intersection of filaments that structure the cosmic web and extend tens of megaparsecs. Although this hypothesis has been supported by the baryonic components, no observational study has detected the dark matter component of the intracluster filaments (ICFs), the terminal segment of the large-scale cosmic filaments at their conjunction with individual clusters. We report weak-lensing detection of ICFs in the Coma cluster field from the ∼12-deg² Hyper Suprime-Cam imaging data. The detection is based on two methods, the matched-filter technique and the shear-peak statistic. The matched-filter technique yields detection significances of 6.6σ and 3.6σ for the northern and western ICFs at 110° and 340°, respectively. The shear-peak statistic yields detection significances of 3.1σ and 2.8σ for these ICFs. Both ICFs are highly correlated with the overdensities in the weak-lensing mass reconstruction and are well aligned with the known large-scale (>10 Mpc) cosmic filaments associated with the Coma supercluster.

一致性宇宙学模型预测，星系团在构成宇宙网的细丝的交叉处生长，并延伸数十兆秒差距。尽管这一假设得到了重子成分的支持，但没有观测研究检测到簇内细丝（ICF）的暗物质成分，ICF是大规模宇宙细丝与各个星团结合处的末端部分。我们报告了从~ 12-deg ² Hyper Suprime-Cam 成像数据中对后发簇场中 ICF 的弱透镜检测。检测基于两种方法：匹配滤波器技术和剪切峰统计。匹配滤波器技术对北部和西部 ICF 在 110° 和 340° 处的检测显着性分别为 6.6 σ和 3.6 σ 。对于这些 ICF，剪切峰统计量产生的检测显着性为 3.1 σ和 2.8 σ 。两个 ICF 都与弱透镜质量重建中的超密度高度相关，并且与与后发超星系团相关的已知大规模 (>10 Mpc) 宇宙细丝很好地对齐。