Prospects for clustering and lensing measurements with forthcoming intensity mapping and optical surveys

被引：31
|
作者：
Pourtsidou, A. [1 ]
Bacon, D. [1 ]
Crittenden, R. [1 ]
Metcalf, R. B. [2 ]
机构：
[1] Univ Portsmouth, Inst Cosmol & Gravitat, Burnaby Rd, Portsmouth PO1 3FX, Hants, England
[2] Univ Bologna, Dipartimento Fis Astron, Alma Mater Studiorum, Viale Berti Pichat 6-2, I-40127 Bologna, Italy
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 459卷 / 01期
关键词：
gravitational lensing: weak; cosmology: observations; cosmology: theory; large-scale structure of Universe; FLUCTUATIONS; COSMOLOGY; EVOLUTION; GAS;
D O I：
10.1093/mnras/stw658
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We explore the potential of using intensity mapping surveys (MeerKAT, SKA) and optical galaxy surveys (DES, LSST) to detect HI clustering and weak gravitational lensing of 21 cm emission in auto-and cross-correlation. Our forecasts show that high-precision measurements of the clustering and lensing signals can be made in the near future using the intensity mapping technique. Such studies can be used to test the intensity mapping method, and constrain parameters such as the HI density Omega(HI), the H I bias b(HI) and the galaxy-H I correlation coefficient r(HI-g).
引用
收藏
页码：863 / 870
页数：8
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