Silk damping at a redshift of a billion: a new limit on small-scale adiabatic perturbations

Abstract

We study the dissipation of small-scale adiabatic perturbations at early times when the Universe is hotter than T ~ 0.5 keV. When the wavelength falls below the damping scale 1/kD, the acoustic modes diffuse and thermalize, causing entropy production. Before neutrino decoupling, kD is primarily set by the neutrino shear viscosity, and we study the effect of acoustic damping on the relic neutrino number, primordial nucleosynthesis, dark-matter freeze-out, and baryogenesis. This sets a new limit on the amplitude of primordial fluctuations of DeltaR^2 < 0.007 at 10^4/Mpc< k < 10^5/Mpc and a model dependent limit of DeltaR^2 < 0.3 at k < 10^{20-25}/Mpc.

arXiv comment4 pages, 3 figures

References in corpus (20)

• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
• New cosmological constraints on primordial black holes
• Anisotropies in the Cosmic Microwave Background: An Analytic Approach
• The evolution of CMB spectral distortions in the early Universe
• Precision measures of the primordial abundance of deuterium
• Probing the inflaton: Small-scale power spectrum constraints from measurements of the CMB energy spectrum
• The primordial abundance of 4He: evidence for non-standard big bang nucleosynthesis
• CMB at 2x2 order: the dissipation of primordial acoustic waves and the observable part of the associated energy release
• Improved constraints on the primordial power spectrum at small scales from ultracompact minihalos
• Generalised constraints on the curvature perturbation from primordial black holes
• Power Spectrum Constraints from Spectral Distortions in the Cosmic Microwave Background
• The primordial helium abundance from updated emissivities
• Minimally Parametric Power Spectrum Reconstruction from the Lyman-alpha Forest
• Observable Spectra of Induced Gravitational Waves from Inflation
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological constraints from the full shape of the clustering wedges
• CMB spectral distortions from small-scale isocurvature fluctuations

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