New upper limit on the total neutrino mass from the 2 degree field galaxy redshift survey.
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.
Institute of Astronomy, University of Cambridge, Madingley Road, United Kingdom.
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Elgarøy
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Lahav
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Percival
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Peacock
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Madgwick
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Bridle
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Baugh
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Baldry
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Bland-Hawthorn
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Bridges
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Cannon
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Cole
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Colless
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Collins
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Couch
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Dalton
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De Propris
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Driver
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Efstathiou
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Ellis
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Frenk
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Glazebrook
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Jackson
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Lewis
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Lumsden
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Maddox
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Norberg
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Peterson
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Sutherland
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Taylor