Hongwei Xi, Bo Peng, Lister Staveley-Smith, Bi-Qing For, Bin Liu, Dejian Ding
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引用次数: 0
摘要
我们利用五百米孔径球面射电望远镜（FAST）对中性氢（HI）进行了超深度盲巡天。我们展示了六个观测场中第一个观测场（FUDS0）的全部结果。这次为期95小时的观测使我们在0.72度^{-1}$的区域内实现了高灵敏度（$\sim 50~\mu$Jy波束$^{-1}$）和高频分辨率（22.9千赫）。探测到128个HI星系，它们分布在0.38美元的红移范围内，而在这一范围内，以前还没有直接探测到非凝聚HI发射。对星表的完整性和可靠性进行了估计。连续波和 HI 通量估计值分别与 NVSS 和 AUDS 保持一致，这证实了为整个 FUDS 勘测开发的校准方法和数据缩减管道的准确性。
FAST Ultra-Deep Survey (FUDS): Data Release for FUDS0
We have used the Five-hundred-meter Aperture Spherical radio Telescope (FAST)
to make a blind ultra-deep survey for neutral hydrogen (HI). We present the
complete results from the first of six fields (FUDS0). This observation of 95
hours allowed us to achieve a high sensitivity ($\sim 50~\mu$Jy beam$^{-1}$)
and a high frequency resolution (22.9 kHz) over an area of 0.72 deg$^2$. We
detected 128 galaxies in HI distributed over the redshift range of $0 0.38$, where no unlensed HI
emission has previously been directly detected. Estimates of completeness and
reliability are presented for the catalog. Consistency of continuum and HI flux
estimates with NVSS and AUDS, respectively, confirms the accuracy of
calibration method and data reduction pipeline developed for the full FUDS
survey.
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