Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 463, Issue 4, Pages 3674-3685Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw2082
Keywords
gravitational lensing: weak; dark energy; dark matter; large-scale structure of Universe; radio continuum: galaxies
Categories
Funding
- ERC [280127, 240672]
- STFC [ST/I005129/1, ST/L000768/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L000768/1, ST/I005129/1] Funding Source: researchfish
- European Research Council (ERC) [240672, 280127] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
We construct forecasts for cosmological parameter constraints from weak gravitational lensing surveys involving the Square Kilometre Array (SKA). Considering matter content, dark energy and modified gravity parameters, we show that the first phase of the SKA (SKA1) can be competitive with other Stage III experiments such as the Dark Energy Survey and that the full SKA (SKA2) can potentially form tighter constraints than Stage IV optical weak lensing experiments, such as those that will be conducted with LSST, WFIRST-AFTA or Euclid-like facilities. Using weak lensing alone, going from SKA1 to SKA2 represents improvements by factors of similar to 10 in matter, similar to 10 in dark energy and similar to 5 in modified gravity parameters. We also show, for the first time, the powerful result that comparably tight constraints (within similar to 5 per cent) for both Stage III and Stage IV experiments, can be gained from cross-correlating shear maps between the optical and radio wavebands, a process which can also eliminate a number of potential sources of systematic errors which can otherwise limit the utility of weak lensing cosmology.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available