用未来十年的X射线观测揭示星系团与宇宙网的联系
Unveiling the Galaxy Cluster - Cosmic Web Connection with X-ray observations in the Next Decade
摘要：
近年来，星系团外围已成为研究宇宙大尺度结构生长的新前沿和独特实验室之一。现代宇宙学流体动力学模拟对发射X射线的星系团内介质的热力学和化学演化做出了可靠和可检验的预测。然而，最近的X射线和Sunyaev-Zeldovich效应观测揭示了与理论预测的神秘分歧，这激发了对在星团外围的Virialization区域运行的大量天体物理过程的更深入研究。星系团外围的许多物理性质与核心有着本质的不同，核心是过去几十年来X射线星系团科学研究的主要焦点。为了揭示星系团和宇宙网成长的全部情况及其在宇宙学中的应用，需要下一代X射线望远镜，该望远镜应在大视场上具有亚弧秒空间分辨率，并具有低而稳定的仪器背景。
英文摘要：
In recent years, the outskirts of galaxy clusters have emerged as one of the new frontiers and unique laboratories for studying the growth of large scale structure in the universe. Modern cosmological hydrodynamical simulations make firm and testable predictions of the thermodynamic and chemical evolution of the X-ray emitting intracluster medium. However, recent X-ray and Sunyaev-Zeldovich effect observations have revealed enigmatic disagreements with theoretical predictions, which have motivated deeper investigations of a plethora of astrophysical processes operating in the virialization region in the cluster outskirts. Much of the physics of cluster outskirts is fundamentally different from that of cluster cores, which has been the main focus of X-ray cluster science over the past several decades. A next-generation X-ray telescope, equipped with sub-arcsecond spatial resolution over a large field of view along with a low and stable instrumental background, is required in order to reveal the full story of the growth of galaxy clusters and the cosmic web and their applications for cosmology.
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