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

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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.

Original languageEnglish
Pages (from-to)863-870
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Early online date18 Mar 2016
Publication statusPublished - 11 Jun 2016


  • Prospects for clustering and lensing measurements

    Rights statement: 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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