Suzaku observation of a high entropy cluster Abell 548W
Kazuhiro Nakazawa, Yuichi Kato, Liyi Gu, Madoka Kawaharada, Motokazu, Takizawa, Yutaka Fujita, Kazuo Makishima

TL;DR
This study uses Suzaku X-ray observations to analyze the temperature, entropy, and merging signatures of the low-luminosity galaxy cluster Abell 548W, revealing evidence of shock acceleration and complex thermal structures.
Contribution
First detailed Suzaku X-ray analysis of Abell 548W, identifying merging signatures and thermal features in a high entropy, low surface brightness cluster.
Findings
Detected ICM emission out to 16' from the center.
Found a cool component (~0.9 keV) near the NW radio source.
Identified a marginal temperature jump consistent with shock acceleration.
Abstract
Abell 548W, one of the galaxy clusters located in the Abell 548 region, has about an order of magnitude lower X-ray luminosity compared to ordinal clusters in view of the well known intracluster medium (ICM) temperature vs X-ray luminosity (kT-L_X) relation. The cluster hosts a pair of diffuse radio sources to the north west and north, both about 10' apart from the cluster center. They are candidate radio relics, frequently associated with merging clusters. A Suzaku deep observation with exposure of 84.4 ks was performed to search signatures for merging in this cluster. The XIS detectors successfully detected the ICM emission out to 16' from the cluster center. The temperature is ~3.6 keV around its center, and ~2 keV at the outermost regions. The hot region (~6 keV) aside the relic candidates shifted to the cluster center reported by XMM-Newton was not seen in the Suzaku data, although…
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