Parameter extraction by Planck for a CDM model with broken scale invariance and cosmological constant

Preprint

5 April 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9807020

Abstract

We consider a class of spatially flat cold dark matter (CDM) models, with a cosmological constant and a broken-scale-invariant (BSI) steplike primordial spectrum of adiabatic perturbations, previously found to be in very good agreement with observations. Performing a Fisher matrix analysis, we show that in case of a large gravitational waves (GW) contribution some free parameters (defining the step) of our BSI model can be extracted with remarkable accuracy by the Planck satellite, thanks to the polarisation anisotropy measurements. Further, cosmological parameters can still be found with very good precision, despite a larger number of free parameters than in the simplest inflationary models.

Keywords

All Related Versions

Version 1, 1998-07-02, ArXiv
Version 2, 1999-04-05, ArXiv
Published version: Monthly Notices of the Royal Astronomical Society, 303 (1), 45.

This publication has 0 references indexed in Scilit: