Improved limit on the neutrino mass with CMB and redshift-dependent halo bias-mass relations from SDSS, DEEP2, and Lyman-break galaxies

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.083535· OSTI ID:21254419

De Bernardis, Francesco ^[1]; Serra, Paolo; Cooray, Asantha ^[2]; Melchiorri, Alessandro ^[1]

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1. Physics Department and Sezione INFN, University of Rome 'La Sapienza', Ple Aldo Moro 2, 00185 Rome (Italy)
2. Center for Cosmology, Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697 (United States)

We 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 5-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 at the 95% confidence level for a {lambda}CDM+m{sub {nu}} model, with a {sigma}{sub 8} equal to {sigma}{sub 8}=0.759{+-}0.025 (1{sigma}). When we allow the dark energy equation-of-state parameter w to vary, we find w=-1.30{+-}0.19 for a general wCDM+m{sub {nu}} model with the 95% confidence level upper limit on the neutrino masses at . The constraint on the dark energy equation of state further improves to w=-1.125{+-}0.092 when using also ACBAR and supernovae Union data, in addition to above, with a prior on the Hubble constant from the Hubble Space Telescope.

• OSTI ID: 21254419
• Journal Information: Physical Review. D, Particles Fields, Vol. 78, Issue 8; Other Information: DOI: 10.1103/PhysRevD.78.083535; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
COSMOLOGICAL CONSTANT
COSMOLOGY
DATA ANALYSIS
EQUATIONS OF STATE
GALAXIES
LUMINOSITY
MASS
NEUTRINOS
NONLUMINOUS MATTER
RED SHIFT
RELICT RADIATION
SPECTRA
TELESCOPES
THREE-DIMENSIONAL CALCULATIONS