Neutrino mass limits from SDSS, 2dFGRS and WMAP

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  • 4 December 2003
Abstract
We investigate whether cosmological data suggest the need for massive neutrinos. We employ galaxy power spectrum measurements from the Sloan Digital Sky Survey (SDSS) and the Two Degree Field Galaxy Redshift Survey (2dFGRS), along with cosmic microwave background (CMB) data from the Wilkinson Microwave Anisotropy Probe (WMAP) and 27 other CMB experiments. We also use the measurement of the Hubble parameter from the Hubble Space Telescope (HST) Key Project. We find the sum of the neutrino masses to be smaller than 0.75 eV at 2\sigma. On inclusion of the 2dFGRS measurement of the bias parameter as a prior, the bound is strengthened to 0.66 eV.

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