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

A. Pourtsidou; D. Bacon; R. Crittenden; R. B. Metcalf

doi:10.1093/mnras/stw658

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

A. Pourtsidou^*, D. Bacon, R. Crittenden, R. B. Metcalf

^*Corresponding author for this work

University of Bologna

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Abstract

We explore the potential of using intensity mapping surveys (MeerKAT, SKA) and optical galaxy surveys (DES, LSST) to detect H_I 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 H_I density ΩH_I, the H_I bias H_I and the galaxy-H_I correlation coefficient rH_I-g.

Original language	English
Pages (from-to)	863-870
Number of pages	8
Journal	Monthly Notices of the Royal Astronomical Society
Volume	459
Issue number	1
Early online date	18 Mar 2016
DOIs	https://doi.org/10.1093/mnras/stw658
Publication status	Published - 11 Jun 2016

Keywords

Cosmology: observations
Cosmology: theory
Gravitational lensing: weak
Large-scale structure of Universe
RCUK
STFC
ST/H002774/1

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10.1093/mnras/stw658

Prospects for clustering and lensing measurements
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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abstract = "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 ΩHI, the HI bias HI and the galaxy-HI correlation coefficient rHI-g.",

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AB - 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 ΩHI, the HI bias HI and the galaxy-HI correlation coefficient rHI-g.

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KW - Large-scale structure of Universe

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

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Keywords

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