Open and closed CDM isocurvature models contrasted with the CMB data

Abstract

We consider pure isocurvature cold dark matter models in the case of open and closed universe. We allow for a large spectral tilt and scan the 6-dimensional parameter space for the best fit to the COBE, Boomerang, and Maxima-1 data. Taking into account constraints from large-scale structure and big bang nucleosynthesis, we find a best fit with ${\chi }^2=121$, which is to be compared to ${\chi }^2=44$ of a flat adiabatic reference model. Hence the current data strongly disfavour pure isocurvature perturbations.

6 pages, 6 figures. V2: Added a discussion of the effect of curvature scale on the primordial power spectrum and made minor changes to match better the Phys. Rev. D 65, 0230XX (2002)

References in corpus (2)

• Cosmological implications of the MAXIMA-I high resolution Cosmic Microwave Background anisotropy measurement
• The NACRE Thermonuclear Reaction Compilation and Big Bang Nucleosynthesis

Cited by in corpus (33)

• Planck 2018 results. X. Constraints on inflation
• Planck 2013 results. XXII. Constraints on inflation
• Non-Gaussianity of the primordial perturbation in the curvaton model
• An Observational Test of Two-field Inflation
• Cosmic Density Perturbations from Late-Decaying Scalar Condensations
• Bounds on isocurvature perturbations from CMB and LSS data
• Correlated Primordial Perturbations in Light of CMB and LSS Data
• Constraints on isocurvature models from the WMAP first-year data
• Correlated isocurvature perturbations from mixed inflaton-curvaton decay
• The initial conditions of the universe: how much isocurvature is allowed?
• Correlated adiabatic and isocurvature CMB fluctuations in the wake of the WMAP
• Cosmological constraints from CMB distortion
• Bounds on CDM and neutrino isocurvature perturbations from CMB and LSS data
• Squeezing the window on isocurvature modes with the Lyman-alpha forest
• Hints of Isocurvature Perturbations in the Cosmic Microwave Background?
• Constraints on primordial isocurvature perturbations and spatial curvature by Bayesian model selection
• Hanbury Brown-Twiss interferometry and second-order correlations of inflaton quanta
• Power Spectra Based Planck Constraints on Compensated Isocurvature, and Forecasts for LiteBIRD and CORE Space Missions
• Generalized CMB initial conditions with pre-equality magnetic fields
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Isocurvature modes and Baryon Acoustic Oscillations
• Measuring the geometry of the Universe in the presence of isocurvature modes
• Probing large-scale magnetism with the Cosmic Microwave Background
• Isocurvature modes and Baryon Acoustic Oscillations II: gains from combining CMB and Large Scale Structure
• Extended open inflationary universes
• Constraints on neutrino density and velocity isocurvature modes from WMAP-9 data
• Probing Compensated Isocurvature with the 21-cm Signal during Cosmic Dawn
• Non-Gaussianity and constraints for the variance of perturbations in the curvaton model
• CMB and Cosmological Parameters: Current Status and Prospects
• Cosmology Rounding the Cape
• Multiple Peaks in the CMB
• Probing small-scale baryon and dark matter isocurvature perturbations with cosmic microwave background anisotropies
• Cosmological perturbation theory with trinity of scalar fields