论文标题
量化电源测量时期射频干扰的过量功率
Quantifying Excess Power from Radio Frequency Interference in Epoch of Reionization Measurements
论文作者
论文摘要
我们量化了射频干扰（RFI）对电离时期（EOR）期间21-CM功率谱测量的影响。具体而言，我们研究了RFI源发射的频率结构如何在高阶波模式下产生污染，这比光滑的前景源更加问题。使用相对乐观的EOR模型，我们发现，即使是一个相对较差的RFI源也可以压倒$ \ sim10 \ sim10 \ text {mk}^2 $的EOR功率频谱信号$ 0.1 \ 0.1 \ text {} h \ text {}如果在最终功率集成中的总明显RFI通量密度保持在1 mjy以下，则应检测到类似于此乐观模型的EOR信号，对于$ k <0.9 \ text {} h \ text {} h \ text {mpc}^{ - 1} $，没有其他系统的污染物和较高的误差，并且是10％。更多的悲观模型将更加限制。这些结果强调了用于寻找EOR的望远镜的高效缓解RFI缓解策略的需求。
We quantify the effect of radio frequency interference (RFI) on measurements of the 21-cm power spectrum during the Epoch of Reionization (EoR). Specifically, we investigate how the frequency structure of RFI source emission generates contamination in higher-order wave modes that is much more problematic than smooth-spectrum foreground sources. Using a relatively optimistic EoR model, we find that even a single relatively dim RFI source can overwhelm the EoR power spectrum signal of $\sim10\text{ mK}^2$ for modes $0.1 \text{ }h\text{ Mpc}^{-1} < k < 2 \text{ }h\text{ Mpc}^{-1}$. If total apparent RFI flux density in the final power spectrum integration is kept below 1 mJy, an EoR signal resembling this optimistic model should be detectable for modes $k < 0.9\text{ }h\text{ Mpc}^{-1}$, given no other systematic contaminants and an error tolerance as high as 10%. More pessimistic models will be more restrictive. These results emphasize the need for highly effective RFI mitigation strategies for telescopes used to search for the EoR.
