Deviation From ΛCDM With Cosmic Strings Networks

Abstract

In this work, we consider a network of cosmic strings to explain possible deviation from ΛCDM behaviour. We use different observational data to constrain the model and show that a small but non zero contribution from the string network is allowed by the observational data which can result in a reasonable departure from ΛCDM evolution. But by calculating the Bayesian Evidence, we show that the present data still strongly favour the concordance ΛCDM model irrespective of the choice of the prior.

15 Pages, Latex Style, 4 eps figures, Revised Version, Accepted for publication in European Physical Journal C

References in corpus (8)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Dynamics of dark energy
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Thawing quintessence with a nearly flat potential
• Constraints on cosmic string tension imposed by the limit on the stochastic gravitational wave background from the European Pulsar Timing Array
• Axions as Quintessence in String Theory
• All sky CMB map from cosmic strings integrated Sachs-Wolfe effect

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
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• Perfect fluids with $\omega =\mathrm{const}$ as sources of scalar cosmological perturbations
• Effect of radiation-like solid on CMB anisotropies
• Cosmic Strings as Dynamical Dark Energy: Novel Constraints
• Exploring the deviation of cosmological constant by a generalized pressure dark energy model
• Inflation driven by scalar field and solid matter
• A pressure parametric dark energy model
• Effect of radiation-like solid on small-scale CMB anisotropies
• Uniformity of Cosmic Microwave Background as a Non-Inflationary Geometrical Effect