论文标题
可观察到21厘米 - 盖拉克斯跨功能光谱的预测，可与SKA和未来的星系调查观察到
Predictions for the 21cm-galaxy cross-power spectrum observable with SKA and future galaxy surveys
论文作者
论文摘要
In this paper we use radiative transfer + N-body simulations to explore the feasibility of measurements of cross-correlations between the 21cm field observed by the Square Kilometer Array (SKA) and high-z Lyman Alpha Emitters (LAEs) detected in galaxy surveys with the Subaru Hyper Supreme Cam (HSC), Subaru Prime Focus Spectrograph (PFS) and Wide Field Infrared Survey Telescope （wfirst）。 21cm-lae互相关实际上是对电离时代的有力探测，因为它们预计将提供有关消电进展和不同红移电离区域的典型规模的宝贵信息。 SKA的下一代观察结果将比具有前体无线电设施的噪声水平低得多，从而在互相关的测量中有了显着改善。我们发现，SKA-HSC/PFS观察将允许在〜10 mpc/h和z = 7.3和6.6时分别研究量表低于10 mpc/h和〜60 mpc/h。 WFIRST将允许访问更高的红移，因为预计将在7.5 <Z <8.5范围内观察到900 LAE和单位红移。由于与HSC和PFS相比，射击噪声的降低，WFIRST的观察结果将导致更精确的互相关并增加可观察到的尺度。
In this paper we use radiative transfer + N-body simulations to explore the feasibility of measurements of cross-correlations between the 21cm field observed by the Square Kilometer Array (SKA) and high-z Lyman Alpha Emitters (LAEs) detected in galaxy surveys with the Subaru Hyper Supreme Cam (HSC), Subaru Prime Focus Spectrograph (PFS) and Wide Field Infrared Survey Telescope (WFIRST). 21cm-LAE cross-correlations are in fact a powerful probe of the epoch of reionization as they are expected to provide precious information on the progress of reionization and the typical scale of ionized regions at different redshifts. The next generation observations with SKA will have a noise level much lower than those with its precursor radio facilities, introducing a significant improvement in the measurement of the cross-correlations. We find that an SKA-HSC/PFS observation will allow to investigate scales below ~10 Mpc/h and ~60 Mpc/h at z=7.3 and 6.6, respectively. WFIRST will allow to access also higher redshifts, as it is expected to observe spectroscopically ~900 LAEs per square degree and unit redshift in the range 7.5<z<8.5. Because of the reduction of the shot noise compared to HSC and PFS, observations with WFIRST will result in more precise cross-correlations and increased observable scales.
