2026-03-10T00:30:32Z https://ir.soken.ac.jp/oai

oai:ir.soken.ac.jp:00004255 2023-06-20T14:26:22Z 1:274

Infall of Matter and X-ray Emission from Superclusters Infall of Matter and X-ray Emission from Superclusters 池内, 了 IKEUCHI, Satoru HIRAYAMA, Yuzo metadata only access © 2014 The Physical Society of Japan Possible detections of X-ray from the intercluster space or a supercluster are reported. Supposing this X-ray is thermal in origin, we study the collapse of primordial gas and the formation of hot gas at the intercluster space between two clusters of galaxies. As for the initial distribution of primordial gas, two models are considered corresponding to two alternative standpoints, that is, the supercluster is an accidental aggregate of clusters or a physical one. The first model is that two clusters are independent and the primordial gas remained after cluster formation distributes in a cluster size and accretes to individual clusters. In this case, the hot intercluster gas is formed by the collision of expanding gas flow from each cluster and X-ray emission from the intercluster space is expected. The other model is that the primordial gas distributes over the scale of a supercluster. The hot gas region after collapse is almost restricted within each cluster, and the X-ray luminosity increases with gas accumulation continuing over the cosmic time. Considering these results, we discuss the possible superclustering in relation to the (future) observations of X-ray morphology. Oxford University Press 1979 eng journal article https://ir.soken.ac.jp/records/4255 https://doi.org/10.1143/PTP.61.881 10.1143/PTP.61.881 0033-068X Progress of Theoretical Physics Progress of Theoretical Physics 61 3 881 894