On the density of Cold Dark Matter

Abstract

The nature of dark matter is increasingly constrained by cosmological data. In this paper, we examine the implications of the Cosmic Microwave Background anisotropy limits on the density of cold dark matter under different theoretical assumptions and combinations of datasets. We infer the constraint ${\Omega }_{cdm}{h}^2=0.12\pm 0.04$ (at 95% c.l.). The CDM models are compared with the shape of the linear matter power spectrum inferred from the 2dF galaxy redshift survey and with the rms mass fluctuations from recent local cluster observations. We found that a value of ${\sigma }_8\sim 1$ as suggested by recent cosmic shear data is not favoured by the CMB data alone nor by combined CMB+SN-Ia, CMB+HST or CMB+2dFGRS analyses. We also extrapolate our bounds on the rms linear mass fluctuations to sub-galactic scales and compare them with recent lensing constraints, finding agreement with the standard $\Lambda$CDM model.

5 pages, 5 figures

References in corpus (18)

• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• A measurement by BOOMERANG of multiple peaks in the angular power spectrum of the cosmic microwave background
• DASI First Results: A Measurement of the Cosmic Microwave Background Angular Power Spectrum
• Multiple Peaks in the Angular Power Spectrum of the Cosmic Microwave Background: Significance and Consequences for Cosmology
• Cosmological Parameter Extraction from the First Season of Observations with DASI
• Measuring ${\Omega }_m$ with the ROSAT Deep Cluster Survey
• New Cosmological and Experimental Constraints on the CMSSM
• Measuring the Equation-of-state of the Universe: Pitfalls and Prospects
• Cosmic Shear Statistics and Cosmology
• Cuspy Dark-Matter Haloes and the Galaxy
• Is cosmology consistent?
• Current constraints on the dark energy equation of state
• Constraining neutrino physics with BBN and CMBR
• X-ray Clusters of Galaxies as Tracers of Structure in the Universe
• Constraining the quintessence equation of state with SnIa data and CMB peaks
• Constraints on flat cosmologies with tracking Quintessence from Cosmic Microwave Background observations
• Reproducing Cosmic Microwave Background anisotropies with mixed isocurvature perturbations
• SUSY Phases, the Electron Electric Dipole Moment and the Muon Magnetic Moment

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