Fast simulations for intensity mapping experiments
Fast simulations for intensity mapping experiments
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DOI：
10.1093/mnras/stu1666
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发表时间：
2014-05
影响因子：
4.8
通讯作者：
D. Alonso;P. Ferreira;Mário G. Santos
中科院分区：
文献类型：
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作者：
D. Alonso;P. Ferreira;Mário G. Santos
我们提供了一个代码来生成21厘米强度映射实验的模拟观测。代码的重点是降低运行全面模拟的计算成本，以计算时间换取准确性。该代码可以用来生成宇宙信号和前景的独立实现，这是必要的，例如，为了获得对未来强度图实验的现实预测。该代码能够为宇宙信号重现正确的角度和径向星系团模式，包括红移空间扭曲、光锥演化和偏差。此外，还可以模拟各种前景，包括可能存在问题的极化同步辐射。
We present a code to generate mock observations of 21 cm intensity mapping experiments. The emphasis of the code is on reducing the computational cost of running a full-blown simulation, trading computational time for accuracy. The code can be used to generate independent realizations of the cosmological signal and foregrounds, which are necessary, for instance, in order to obtain realistic forecasts for future intensity mapping experiments. The code is able to reproduce the correct angular and radial clustering pattern for the cosmological signal, including redshift-space distortions, lightcone evolution and bias. Furthermore, it is possible to simulate a variety of foregrounds, including the potentially problematic polarized synchrotron emission.