期刊
ASTROPHYSICAL JOURNAL
卷 798, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0004-637X/798/1/40
关键词
cosmological parameters; large-scale structure of universe
资金
- MoST 863 program [2012AA121701]
- NSFC [11373030, 11303034]
- CAS Strategic Priority Research Program The Emergence of Cosmological Structures [XDB09000000]
The Tianlai experiment is dedicated to the observation of large-scale structures (LSS) by the 21 cm intensity mapping technique. In this paper, we make forecasts concerning its ability to observe or constrain the dark energy parameters and the primordial non-Gaussianity. From the LSS data, one can use the baryon acoustic oscillation (BAO) and growth rate derived from the redshift space distortion (RSD) to measure the dark energy density and equation of state. The primordial non-Gaussianity can be constrained either by looking for scale-dependent bias in the power spectrum, or by using the bispectrum. Here, we consider three cases: the Tianlai cylinder array pathfinder that is currently being built, an upgrade of the Pathfinder Array with more receiver units, and the full-scale Tianlai cylinder array. Using the full-scale Tianlai experiment, we expect sigma(omega 0) similar to 0 0.082 and sigma(omega a) similar to 0.21 from the BAO and RSD measurements, sigma(local)(fNL) 14 from the power spectrum measurements with scale-dependent bias, and sigma(local)(fNL) similar to 22 and a sigma(equil)(fNL) similar to 157 from the bispectrum measurements.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据