Virial shocks around galaxy clusters are expected to show a cutoff in the thermal Sunyaev-Zel'dovich (SZ) signal, coincident with a leptonic ring. However, until now, leptonic virial signals were reported only in Coma and in stacked Fermi-LAT clusters, and an SZ virial shock signal was reported only in A2319. We point out that a few clusters --- presently Coma, A2319, and A2142 --- already show a sharp drop in Planck SZ pressure near the virial radius, coincident with a weak LAT $\gamma$-ray excess. These signatures are shown to trace the virial shocks of the clusters, at joint medium to high confidence levels. The electron acceleration rates inferred from $\gamma$-rays are consistent with previous measurements. The combined signal allows a separate measurement of the $\sim0.5\%$ acceleration efficiency and of the accretion rate. Lower limits of order a few are imposed on the shock Mach numbers.

中文翻译：

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来自集群病毒冲击的重合 Sunyaev–Zel'dovich 和伽马射线信号

预计星系团周围的病毒激波将显示热 Sunyaev-Zel'dovich (SZ) 信号的截止，与轻子环重合。然而，到目前为止，仅在昏迷和堆叠的 Fermi-LAT 星团中报告了轻子病毒信号，而仅在 A2319 中报告了 SZ 病毒休克信号。我们指出，一些星团——目前是昏迷、A2319 和 A2142——已经在维里半径附近显示出普朗克 SZ 压力的急剧下降，与 LAT $\gamma$ 射线过量相吻合。这些特征被证明可以在联合中到高置信水平下追踪集群的病毒冲击。从 $\gamma$ 射线推断出的电子加速度与之前的测量结果一致。组合信号允许单独测量 $\sim0.5\%$ 加速效率和吸积率。