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

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 lensin...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2016-06, Vol.459 (1), p.863-870
Main Authors: Pourtsidou, A., Bacon, D., Crittenden, R., Metcalf, R. B.
Format: Article
Language:English
Subjects:
Clustering
Correlation analysis
Density
Emission
Forecasts
Galaxies
Gravitational lenses
Mapping
Measurement
Stars & galaxies
Symbols
Test procedures
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Summary: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 $\Omega _{\rm H\,\small {I}}$ , the H i bias $b_{\rm H\,\small {I}}$ and the galaxy-H i correlation coefficient $r_{\rm H\,\small {I}-g}$ .
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stw658