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Abstract

Constraints on neutrino masses from CFHTLS cosmic shear

We use weak lensing measurements from the latest release of the Canada-France-Hawaii Telescope Legacy Survey to probe suppression of cosmic shear correlations and consequently constrain neutrino masses. We obtain broad constraints which are greatly improved when we combine them with WMAP-5 cosmic microwave background anisotropy data, baryonic acoustic oscillations from SDSS and 2dFGRS and supernovae data from SNLS and Gold-set. The combined constraints on the sum of neutrino masses at 95\% confidence level are an upper bound of 0.54 eV and a lower bound of 0.03 eV. The preference for massive neutrinos vanishes when we include shear-measurement systematics in the analysis.

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