Journal
ASTRONOMY & ASTROPHYSICS
Volume 530, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201016273
Keywords
gravitational lensing: weak; large-scale structure of Universe; cosmological parameters
Categories
Funding
- NASA [NAS 5-26555]
- FCT (Portugal)
- European Programme DUEL RTN
- European Programme CALICE ERG
- Netherlands Organization for Scientific Research (NWO)
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The observed acceleration of the universe, explained through dark energy, could alternatively be explained through a modification of gravity that would also induce modifications in the evolution of cosmological perturbations. We use new weak lensing data from the COSMOS survey to test for deviations from general relativity (GR). The departure from GR is parametrized in a model-independent way that consistently parametrizes the two-point cosmic shear amplitude and growth. Using CMB priors, we perform a likelihood analysis. We find constraints on the amplitude of the signal that do not indicate a deviation from GR.
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