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New upper limit on the total neutrino mass from the 2 degree field galaxy redshift survey.

Journal article published in 2002 by {Ø} {Elgar{ø}y}, O. {Lahav}, W. J. {Percival}, J. A. {Peacock}, D. S. {Madgwick}, S. L. {Bridle}, C. M. {Baugh}, I. K. {Baldry}, J. {Bland-Hawthorn}, T. {Bridges}, R. {Cannon}, S. {Cole}, M. {Colless}, C. {Collins}, W. {Couch} and other authors.
This paper is available in a repository.
This paper is available in a repository.

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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.