圣达菲光锥模拟项目：II。用SZE测量直接检测WHIM的前景
The Santa Fe Light Cone Simulation Project: II. The Prospects for Direct Detection of the WHIM with SZE Surveys
摘要：
使用Sunyaev-Zeldovich效应（SZE）巡天探测温热星系际介质（WHIM）是一种有趣的可能性，它可以让观测者量化WHIM阶段中“丢失的重子”的数量。我们估计所需的灵敏度，用于检测低密度WHIM气体与南极望远镜（SPT）和普朗克勘测合成100平方度的天空调查。这个调查是从一个非常大的，高动态范围的自适应网格细化宇宙学模拟恩佐代码。我们发现，对于SPT调查灵敏度的适度增加（2-4倍），WHIM气体对综合天空信号做出了可检测的贡献。对于类似普朗克的卫星，类似的探测是可能的，灵敏度更显着增加（8-10倍）。我们指出，对于WHIM气体，运动SZE信号有时可以主导热SZE的热SZE的减量是最大的（150 GHz），并使用两者的组合增加了WHIM检测使用SZE调查的机会。然而，我们没有发现任何证据的独特功能的热SZE角功率谱，可能有助于其检测。有趣的是，有不同的功率谱的运动SZE，这可能不允许我们直接检测WHIM，但可能是一个重要的污染物在宇宙学分析的kSZE导出的速度场。从数值模拟中得出的校正可能是必要的，以解释这种污染。
英文摘要：
Detection of the Warm-Hot Intergalactic Medium (WHIM) using Sunyaev-Zeldovich effect (SZE) surveys is an intriguing possibility, and one that may allow observers to quantify the amount of "missing baryons" in the WHIM phase. We estimate the necessary sensitivity for detecting low density WHIM gas with the South Pole Telescope (SPT) and Planck Surveyor for a synthetic 100 square degree sky survey. This survey is generated from a very large, high dynamic range adaptive mesh refinement cosmological simulation performed with the Enzo code. We find that for a modest increase in the SPT survey sensitivity (a factor of 2-4), the WHIM gas makes a detectable contribution to the integrated sky signal. For a Planck-like satellite, similar detections are possible with a more significant increase in sensitivity (a factor of 8-10). We point out that for the WHIM gas, the kinematic SZE signal can sometimes dominate the thermal SZE where the thermal SZE decrement is maximal (150 GHz), and that using the combination of the two increases the chance of WHIM detection using SZE surveys. However, we find no evidence of unique features in the thermal SZE angular power spectrum that may aid in its detection. Interestingly, there are differences in the power spectrum of the kinematic SZE, which may not allow us to detect the WHIM directly, but could be an important contaminant in cosmological analyses of the kSZE-derived velocity field. Corrections derived from numerical simulations may be necessary to account for this contamination.
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