An improved limit on the neutrino mass with CMB and redshift-dependent halo bias-mass relations from SDSS, DEEP2, and Lyman-Break Galaxies

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dc.creatorDe Bernardis, Francesco
dc.creatorSerra, Paolo
dc.creatorCooray, Asantha
dc.creatorMelchiorri, Alessandro
dc.date2008-09-05
dc.date.accessioned2026-07-07T11:45:45Z
dc.date.available2026-07-07T11:45:45Z
dc.descriptionWe use measurements of luminosity-dependent galaxy bias at several different redshifts, SDSS at $z=0.05$, DEEP2 at $z=1$ and LBGs at $z=3.8$, combined with WMAP five-year cosmic microwave background anisotropy data and SDSS Red Luminous Galaxy survey three-dimensional clustering power spectrum to put constraints on cosmological parameters. Fitting this combined dataset, we show that the luminosity-dependent bias data that probe the relation between halo bias and halo mass and its redshift evolution are very sensitive to sum of the neutrino masses: in particular we obtain the upper limit of $\sum m_ν<0.28$eV at the 95% confidence level for a $ΛCDM + m_ν$ model, with a $σ_8$ equal to $σ_8=0.759\pm0.025$ (1$σ$). When we allow the dark energy equation of state parameter $w$ to vary we find $w=-1.30\pm0.19$ for a general $wCDM+m_ν$ model with the 95% confidence level upper limit on the neutrino masses at $\sum m_ν<0.59$eV. The constraint on the dark energy equation of state further improves to $w=-1.125\pm0.092$ when using also ACBAR and supernovae Union data, in addition to above, with a prior on the Hubble constant from the Hubble Space Telescope.
dc.description9 pages, 6 figures, submitted to PRD
dc.identifierhttps://arxiv.org/abs/0809.1095
dc.identifierhttp://arxiv.org/abs/0809.1095
dc.identifierPhys.Rev.D78:083535,2008
dc.identifierdoi:10.1103/PhysRevD.78.083535
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201987
dc.subjectAstrophysics
dc.titleAn improved limit on the neutrino mass with CMB and redshift-dependent halo bias-mass relations from SDSS, DEEP2, and Lyman-Break Galaxies
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