On merging galaxy cluster MACS J0358.8-2955

As a merging galaxy cluster with a large velocity component in the line of sight, MACS J0358.8-2955 provides an important sample for studying the dynamical structure of galaxy clusters．In this article the data of this regiment were re-analyzed with the latest methods to confirm specific stage of this merger event．In the optical band, we adopt the blooming tree technique to identify substructures and find unambiguous galaxy members of its two merging components．Archived data from Chandra X-ray telescope were analyzed, to obtain redshift information of intra-cluster medium by X-ray spectrum fitting, to not only give direct evidence of relationship between X-ray gas and optical galaxies, but also to show the approach path of the two substructures．High-resolution temperature map generated with ClusterPyXT tool revealed shock heating signal in the surrounding environment, giving a motion trajectory of the merger event．The present work provides information on apparent velocity of optical galaxies and hot gas, complements existing knowledge on the merging process of galaxy cluster MACSJ0358, and obtains a 3D picture of early merger event．