New upper limit on the total neutrino mass from the 2 degree field galaxy redshift survey.
/ Authors
O. Elgaroy, O. Lahav, W. Percival, J. Peacock, D. Madgwick, S. Bridle, C. Baugh, I. Baldry, J. Bland-Hawthorn, T. Bridges
and 20 more authors
R. Cannon, S. Cole, M. Colless, C. Collins, W. Couch, Gavin B. Dalton, R. Propris, S. Driver, G. Efstathiou, R. Ellis, C. Frenk, K. Glazebrook, Carole Jackson, Ian Lewis, S. Lumsden, S. Maddox, P. Norberg, B. Peterson, W. Sutherland, K. Taylor
/ Abstract
We constrain f(nu) identical with Omega(nu)/Omega(m), the fractional contribution of neutrinos to the total mass density in the Universe, by comparing the power spectrum of fluctuations derived from the 2 Degree Field Galaxy Redshift Survey with power spectra for models with four components: baryons, cold dark matter, massive neutrinos, and a cosmological constant. Adding constraints from independent cosmological probes we find f(nu)<0.13 (at 95% confidence) for a prior of 0.1<Omega(m)<0.5, and assuming the scalar spectral index n=1. This translates to an upper limit on the total neutrino mass m(nu,tot)<1.8 eV for "concordance" values of Omega(m) and the Hubble constant.
Journal: Physical review letters