Journal article
Intensity mapping cross-correlations: Connecting the largest scales to galaxy evolution
L Wolz, C Tonini, C Blake, JSB Wyithe
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2016
DOI: 10.1093/mnras/stw535
Abstract
Intensity mapping of the neutral hydrogen (H i) is a new observational tool to efficiently map the large-scale structure over wide redshift ranges. The cross-correlation of intensity maps with galaxy surveys is a robust measure of the cosmological power spectrum and the H i content of galaxies which diminishes systematics caused by instrumental effects and foreground removal. We examine the cross-correlation signature at redshift 0.9 using a semi-analytical galaxy formation model in order to model the H i gas of galaxies as well as their optical magnitudes. We determine the scale-dependent clustering of the cross-correlation power for different types of galaxies determined by their colours, ..
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Awarded by Australian Research Council
Funding Acknowledgements
We would like to thank Darren Croton for the use of the semi-analytical model and his useful comments throughout the project. We also would like to thank the referee for their constructive review and helpful suggestions. CB acknowledges the support of the Australian Research Council through the award of a Future Fellowship. The Centre for All-Sky Astrophysics is an Australian Research Council Centre of Excellence, funded by grant CE11E0090.