We present a new extended XMM-Newton mosaic of the nearby Coma cluster, which covers the cluster out to the virial radius with nearly complete azimuthal coverage. This large mosaic is combined with the Planck Sunyaev Zel'dovich effect observations to recover the thermodynamic properties of the intracluster medium in an azimuthally averaged profile and 36 angular sectors, producing the highest spatial resolution view of the thermodynamics of the outskirts of a galaxy cluster in its entirety. Beyond $r_{500}$, our clumping corrected entropy measurements along the less disturbed directions are statistically consistent with the power-law entropy profile predicted by non-radiative simulations, and the gas mass fraction agrees with the mean cosmic baryon fraction. However, there is a clear entropy deficit in the outskirts to the southwest, coinciding with where Coma connects to a cosmic web filament which joins it to Abell 1367. The low entropy to the southwest extends from 0.5-1.0$r_{200}$, and is consistent with what is expected from simulations of a filamentary gas stream penetrating into the cluster as it continues to accrete matter from the cosmic web. We also find that the radial profiles of the recovered quantities become increasingly asymmetric in the outskirts, particularly along the more disturbed directions, consistent with the predictions of cosmological simulations.

中文翻译：

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昏迷星团外围的完整视图

我们展示了附近彗发星团的新扩展 XMM-牛顿马赛克，它以几乎完整的方位角覆盖将星团覆盖到维里半径。这个大马赛克与普朗克 Sunyaev Zel'dovich 效应观测相结合，以方位平均剖面和 36 个角扇区恢复星团内介质的热力学特性，产生星系团外围热力学的最高空间分辨率视图它的整体。除了 $r_{500}$ 之外，我们沿较少干扰方向的成束校正熵测量结果与非辐射模拟预测的幂律熵分布在统计上一致，并且气体质量分数与平均宇宙重子分数一致。然而，西南郊区存在明显的熵亏，与彗发连接到宇宙网丝的位置一致，宇宙网丝将它连接到 Abell 1367。西南的低熵从 0.5-1.0$r_{200}$ 延伸，与模拟的丝状气流穿透的预期一致进入星团，因为它继续从宇宙网吸积物质。我们还发现，恢复量的径向分布在郊区变得越来越不对称，尤其是在更受干扰的方向上，这与宇宙学模拟的预测一致。并且与对穿透星团的丝状气流模拟所预期的结果一致，因为它继续从宇宙网吸积物质。我们还发现，恢复量的径向分布在郊区变得越来越不对称，尤其是在更受干扰的方向上，这与宇宙学模拟的预测一致。并且与对穿透星团的丝状气流模拟所预期的结果一致，因为它继续从宇宙网吸积物质。我们还发现，恢复量的径向分布在郊区变得越来越不对称，尤其是在更受干扰的方向上，这与宇宙学模拟的预测一致。