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首页> 外文期刊>Astronomy and astrophysics >Forecasts for the detection of the magnetised cosmic web from cosmological simulations
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Forecasts for the detection of the magnetised cosmic web from cosmological simulations

机译:从宇宙学模拟中检测出磁化宇宙网的预测

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摘要

The cosmic web contains a large part of the total gas mass in the Universe, but it 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-magnetohydrodynamic 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.
机译:宇宙网包含宇宙中总气体质量的很大一部分,但是很难在大多数波长下检测到。激波加速电子产生的同步加速器发射可能会提供在无线电波长下成像宇宙纤维网的机会。在这项工作中,我们使用3D宇宙学ENZO磁流体动力学模拟(结合对磁场的后处理重新归一化,以排除缺失的物理成分和分辨率效应)来产生宇宙网辐射的模型。在后期处理中,我们研究了13种大型无线电调查检测这种排放的能力。我们发现通过LOFAR,SKA1-LOW和MWA进行的调查有可能检测到宇宙纤维网,只要细丝中的弱介质的磁化水平约为热气能的1%即可。

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