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The results of Suzaku observations of the outskirts of Abell 3395 including alarge-scale structure filament toward Abell 3391 are presented. We measuredtemperature and abundance distributions from the southern outskirt of Abell3395 to the north at the virial radius, where a filament structure has beenfound in the former X-ray and Sunyaev-Zel'dovich effect observations betweenAbell 3391 and 3395. The overall temperature structure is consistent with theuniversal profile proposed by Okabe et al.(2014) for relaxed clusters exceptfor the filament region. A hint of the ICM heating is found between the twoclusters, which might be due to the interaction of them in the early phase of acluster merger. Although we obtained relatively low metal abundance of$Z=0.169^{+0.164+0.009+0.018 }_{-0.150-0.004-0.015 }$ solar, where the first,second, and third errors are statistical, cosmic X-ray background systematic,and non X-ray background systematic, respectively, at the virial radius in thefilament, our results are still consistent with the former results of otherclusters ($Z \sim 0.3$ solar) within errors. Therefore, our results are alsoconsistent with the early enrichment scenario. We estimated Compton $y$parameters only from X-ray results in the region between Abell 3391 and 3395assuming a simple geometry. They are smaller than the previous SZ results withPlanck satellite. The difference could be attributed to a more elaborategeometry such as a filament inclined to the line-of-sight direction, orunderestimation of the X-ray temperature because of the unresolvedmulti-temperature structures or undetected hot X-ray emission of the shockheated gas.

Suzaku Observations of the Outskirts of the Galaxy Cluster Abell 3395 including a Filament toward Abell 3391