论文标题
在红移空间中的全身双光谱，用于21厘米强度地图
Full-sky bispectrum in redshift space for 21cm intensity maps
论文作者
论文摘要
我们计算回离后21cm强度映射的树级双光谱。我们在直接可观察到的角和红移空间中工作，重点是相等的红移相关性和薄的红移箱，镜头的贡献可以忽略不计。我们证明了通常主导结果的红移空间扭曲的贡献的重要性。考虑到望远镜梁和前景清洁的影响，我们将信号估算为噪声，并表明双光谱在单次模式下以单次模式和HIRAX在干涉仪模式下，尤其是在各自范围内的较低红移。
We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in the directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the lensing contribution is negligible. We demonstrate the importance of the contributions from redshift-space distortions which typically dominate the result. Taking into account the effects of telescope beams and foreground cleaning, we estimate the signal to noise and show that the bispectrum is detectable by both SKA in single-dish mode and HIRAX in interferometer mode, especially at the lower redshifts in their respective ranges.
