磁生和宇宙网：无线电观测和数值模拟的联合挑战
Magnetogenesis and the Cosmic Web: a joint challenge for radio observations and numerical simulations
摘要：
从宇宙网络中的丝状体中检测到无线电信号对于区分可能的磁生情景至关重要。我们回顾了在无线电波段探测宇宙网的不同尝试的现状。这是我们的{ \magcow }项目在过去几年中进行的宇宙磁性高级模拟的背景。虽然首次尝试用MWA和LOFAR对宇宙网进行成像是令人鼓舞的，并且可能会放弃一些磁生模型，但这些观测背后的复杂性使得一个明确的答案仍然不确定。SKA和LOFAR 2.0将实现的低射频下的总强度和偏振数据的组合是消除与沿深层视线的许多可能信号源的贡献有关的现有不确定性的关键。这将使我们有可能分离出暗条的贡献，并揭示它与河外磁性起源的深层物理联系。
英文摘要：
The detection of the radio signal from filaments in the cosmic web is crucial to distinguish possible magnetogenesis scenarios. We review the status of the different attempts to detect the cosmic web at radio wavelengths. This is put into the context of the advanced simulations of cosmic magnetism carried out in the last few years by our {\magcow} project. While first attempts of imaging the cosmic web with the MWA and LOFAR have been encouraging and could discard some magnetogenesis models, the complexity behind such observations makes a definitive answer still uncertain. A combination of total intensity and polarimetric data at low radio frequencies that the SKA and LOFAR2.0 will achieve is key to removing the existing uncertainties related to the contribution of many possible sources of signal along deep lines of sight. This will make it possible to isolate the contribution from filaments, and expose its deep physical connection with the origin of extragalactic magnetism.
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