S21B0147

We propose an hour, two-band (g and i2) Subaru/HSC observations for weak lensing studies of the largest span radio relic galaxy cluster ClG 0217+70. The recent results from Chandra X-ray and LOFAR radio observations revealed that it is a gigantic radio halo - multiple relic system, where the separation of the two outermost relics reaches 5.4 Mpc (28’) and the southeastern relic has a linear size of 3.5 Mpc. The X-ray observation reveals two inner surface brightness edges, which are not aligned with the orientation of the relics. To understand the formation of the inner edges, which are plausible secondary shocks in the late phase of a merger, the merging dynamics is needed. Since the dark matter distribution controls the merger dynamics, a weak-lensing mass measurement for the cluster is essential. Combined with multi-band data of X-ray, radio, optical, and weak-lensing, we first enables to understand the formation of giant radio relic and the interplay between the gas, the relativistic electrons, and the dark matter. The Subaru/HSC is the most important and powerful instrument to reveal dark matter distribution covering the separation of the two outermost relics of 28’.

This document was translated from L^AT_EX by H^EV^EA.