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.
Elgarøy
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Institute of Astronomy, University of Cambridge, Madingley Road, United Kingdom.
Lahav
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Percival
W J
WJ
Peacock
J A
JA
Madgwick
D S
DS
Bridle
S L
SL
Baugh
C M
CM
Baldry
I K
IK
Bland-Hawthorn
J
J
Bridges
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T
Cannon
R
R
Cole
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S
Colless
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M
Collins
C
C
Couch
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W
Dalton
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G
De Propris
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R
Driver
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Efstathiou
G P
GP
Ellis
R S
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Frenk
C S
CS
Glazebrook
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K
Jackson
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C
Lewis
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I
Lumsden
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Maddox
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Norberg
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P
Peterson
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BA
Sutherland
W
W
Taylor
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