Deviation from ΛCDM with cosmic strings networks

In this work, we consider a network of cosmic strings to explain a possible deviation from Λ CDM 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 r...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 73; no. 9; pp. 1 - 8
Main Authors Kumar, Sumit, Nautiyal, Akhilesh, Sen, Anjan A.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2013
Springer
Subjects
Astronomy
Astrophysics and Cosmology
Bayesian analysis
Deviation
Elementary Particles
Evolution
Hadrons
Heavy Ions
Mathematical models
Measurement Science and Instrumentation
Networks
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
String Theory
Strings
Cosmological Constant
Cosmic String
Dark Energy
Condensed Matter System
Dark Energy Model
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Summary:In this work, we consider a network of cosmic strings to explain a possible deviation from Λ CDM 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 Λ CDM evolution. But by calculating the Bayesian evidence, we show that the present data still strongly favour the concordance Λ CDM model irrespective of the choice of the prior.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-013-2562-z