从宇宙学模拟预测磁化宇宙网的探测
Forecasts for the detection of the magnetised cosmic web from cosmological simulations
摘要：
宇宙网包含宇宙中总气体质量的很大一部分，但在大多数波长下很难检测到。来自冲击加速电子的同步辐射可能提供在无线电波段对宇宙网成像的机会。在这项工作中，我们使用3D宇宙学ENZO-MHD模拟（结合后处理的磁场重新归一化，以括号中缺少的物理成分和分辨率的影响），以产生从宇宙网络的无线电发射的模型。在后处理中，我们研究了13个大型无线电调查的能力，以检测这种排放。我们发现，调查LOFAR，SKA 1-LOW和MWA有机会检测到宇宙网络，提供的细丝中的稀薄介质的磁化水平是热气体能量的1%的顺序。
英文摘要：
The cosmic web contains a large fraction of the total gas mass in the universe but is difficult to detect at most wavelengths. Synchrotron emission from shock-accelerated electrons may offer the chance of imaging the cosmic web at radio wavelengths. In this work we use 3D cosmological ENZO-MHD simulations (combined with a post-processing renormalisation of the magnetic field to bracket for missing physical ingredients and resolution effects) to produce models of the radio emission from the cosmic web. In post-processing we study the capabilities of 13 large radio surveys to detect this emission. We find that surveys by LOFAR, SKA1-LOW and MWA have a chance of detecting the cosmic web, provided that the magnetisation level of the tenuous medium in filaments is of the order of 1% of the thermal gas energy.
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