Constraint on the Effective Number of Neutrino Species from the WMAP and SDSS LRG Power Spectra

Abstract

We derive constraint on the effective number of neutrino species N_nu from the cosmic microwave background power spectrum of the WMAP and galaxy clustering power spectrum of the SDSS luminous red galaxies (LRGs). Using these two latest data sets of CMB and galaxy clustering alone, we obtain the limit 0.9 < N_nu < 8.2 (95% C.L.) for the power-law LambdaCDM flat universe, with no external prior. The lower limit corresponds to the lower bound on the reheating temperature of the universe T_R > 2 MeV.

arXiv comment16 pages, 3 figure. (v2) More explanation and discussion on our analysis. A section and figures are added

References in corpus (51)

• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• A Line of Sight Approach to Cosmic Microwave Background Anisotropies
• The 3D power spectrum of galaxies from the SDSS
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• MeV-scale Reheating Temperature and Thermalization of Neutrino Background
• Neutrinos in cosmology
• What is the lowest possible reheating temperature?
• Thermal Inflation and the Moduli Problem
• New BBN limits on Physics Beyond the Standard Model from He4
• Cosmological Constraints on Late-time Entropy Production
• The Linear Theory Power Spectrum from the Lyman-alpha Forest in the Sloan Digital Sky Survey
• A Realistic Determination of the Error on the Primordial Helium Abundance: Steps Toward Non-Parametric Nebular Helium Abundances
• Neutrino masses and the number of neutrino species from WMAP and 2dFGRS
• The oscillation effects on thermalization of the neutrinos in the universe with low reheating temperature
• Moduli Decays and Gravitinos
• Heavy sterile neutrinos: Bounds from big-bang nucleosynthesis and SN 1987A
• Gravitino Overproduction in Inflaton Decay
• Effective number of neutrinos and baryon asymmetry from BBN and WMAP
• Large neutrino asymmetries from neutrino oscillations
• The Gravitino-Overproduction Problem in Inflationary Universe
• Current cosmological bounds on neutrino masses and relativistic relics
• Moduli/Inflaton Mixing with Supersymmetry Breaking Field
• Constraining Neutrino Masses by CMB Experiments Alone
• BBN bounds on active-sterile neutrino mixing
• The Impact of an Extra Background of Relativistic Particles on the Cosmological Parameters derived from Microwave Background Anisotropies
• Inflaton Decay through Supergravity Effects
• Large lepton asymmetry from Q-balls
• Generation of Large Lepton Asymmetries
• How Does CMB + BBN Constrain New Physics?
• The Small Observed Baryon Asymmetry from a Large Lepton Asymmetry
• Primordial Helium Abundance: A Reanalysis of the Izotov-Thuan Spectroscopic Sample
• Naturally Large Cosmological Neutrino Asymmetries in the MSSM
• Spontaneous baryogenesis in flat directions
• Neutrino masses and cosmic radiation density: Combined analysis
• Limit on the Neutrino Mass from the WMAP Three Year Data
• Measuring the cosmological background of relativistic particles with WMAP
• Constraints on the cosmic neutrino background
• Cosmology of neutrinos and extra light particles after WMAP3
• Baryogenesis in a flat direction with neither baryon nor lepton charge
• Cosmological Moduli Problem and Thermal Inflation Models
• Late-time entropy production due to the decay of domain walls
• Non-thermal Production of Dark Matter from Late-Decaying Scalar Field at Intermediate Scale
• Neutrino oscillations in the early universe: How large lepton asymmetry can be generated?
• New CMBR data and the cosmic neutrino background
• Generation of cosmological large lepton asymmetry from a rolling scalar field
• Cosmological Constraint on the String Dilaton in Gauge-mediated Supersymmetry Breaking Theories
• Revisiting the Constraint on the Helium Abundance from CMB
• Do neutrino flavor oscillations forbid large lepton asymmetry of the universe ?
• New constraint on the cosmological background of relativistic particles
• Active-sterile neutrino oscillations in the early Universe: asymmetry generation at low |delta m^2| and the Landau-Zener approximation

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