The Python Sky Model: software for simulating the Galactic microwave sky
The Python Sky Model: software for simulating the Galactic microwave sky
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DOI：
10.1093/mnras/stx949
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发表时间：
2016-08
影响因子：
4.8
通讯作者：
B. Thorne;J. Dunkley;D. Alonso;S. Naess
中科院分区：
文献类型：
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作者：
B. Thorne;J. Dunkley;D. Alonso;S. Naess
我们提出了一个数值代码来模拟银河系发射的强度和偏振在微波频率的地图，帮助宇宙微波背景实验的设计。这个python代码建立在现有的努力，通过提供一个易于使用的界面来模拟天空，并基于来自WMAP（威尔金森微波各向异性探测器）和普朗克卫星任务的公开数据。我们模拟同步加速器，热尘埃，自由和异常的微波发射在整个天空中，除了宇宙微波背景，并包括一组替代处方的频率依赖性的每个组件，例如，极化尘埃与多个温度和去相关的信号与频率，这引入了复杂性，是符合当前的数据。我们还提出了一个新的处方，增加这些组件的小规模实现的分辨率大于目前的全天测量。通过预测不同前景复杂度对恢复张量标量比的LiteBIRD卫星的影响，证明了代码的有用性。该代码可从以下网址获得：https://github.com/bthorne93/PySM_public。
We present a numerical code to simulate maps of Galactic emission in intensity and polarization at microwave frequencies, aiding in the design of cosmic microwave background experiments. This python code builds on existing efforts to simulate the sky by providing an easy-to-use interface and is based on publicly available data from the WMAP (Wilkinson Microwave Anisotropy Probe) and Planck satellite missions. We simulate synchrotron, thermal dust, free–free and anomalous microwave emission over the whole sky, in addition to the cosmic microwave background, and include a set of alternative prescriptions for the frequency dependence of each component, for example, polarized dust with multiple temperatures and a decorrelation of the signals with frequency, which introduce complexity that is consistent with current data. We also present a new prescription for adding small-scale realizations of these components at resolutions greater than current all-sky measurements. The usefulness of the code is demonstrated by forecasting the impact of varying foreground complexity on the recovered tensor-to-scalar ratio for the LiteBIRD satellite. The code is available at: https://github.com/bthorne93/PySM_public.