Journal article
Late-time cosmology with 21cm intensity mapping experiments
- Abstract:
- We present a framework for forecasting cosmological constraints from future neutral hydrogen intensity mapping experiments at low to intermediate redshifts. In the process, we establish a simple way of comparing such surveys with optical galaxy redshift surveys. We explore a wide range of experimental configurations and assess how well a number of cosmological observables (the expansion rate, growth rate, and angular diameter distance) and parameters (the densities of dark energy and dark matter, spatial curvature, the dark energy equation of state, etc.) will be measured by an extensive roster of upcoming experiments. A number of potential contaminants and systematic effects are also studied in detail. The overall picture is encouraging - Phase I of the SKA should be able to constrain the dark energy equation of state about as well as a DETF Stage IV galaxy redshift survey like Euclid or LSST, in roughly the same timeframe.
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Authors
- Publication date:
- 2014-05-06
- Keywords:
- Pubs id:
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pubs:464514
- UUID:
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uuid:dbcfbf72-9af6-4864-9312-3bc57142a1fd
- Local pid:
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pubs:464514
- Source identifiers:
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464514
- Deposit date:
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2014-11-09
Terms of use
- Copyright date:
- 2014
- Notes:
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36 pages, 30 figures. For the busy reader: See Section VIII, Figs.
19/28, and Table IV
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