Extended $\Lambda$CDM model

H. S. Gimenes; R. SIlva; W. J. C. da Silva

Extended $\Lambda$CDM model

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arxiv 1809.07797 v2 pith:OEDDEXIF submitted 2018-09-20 astro-ph.CO

W. J. C. da Silva , H. S. Gimenes , R. Silva This is my paper · ORCID

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keywords bulkdarkdissipativegeneralizedlambdamattermodelnonextensive

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abstract

In this work we discuss a general approach for the dissipative dark matter considering a nonextensive bulk viscosity and taking into account the role of generalized Friedmann equations. This generalized $\Lambda$CDM model encompasses a flat universe with a dissipative nonextensive viscous dark matter component, following the Eckart theory of bulk viscosity. In order to compare models and constrain cosmological parameters, we perform Bayesian analysis using one of the most recent observations of Type Ia Supernova, baryon acoustic oscillations, and cosmic microwave background data.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Fractional Dark Matter decay: cosmological imprints and observational constraints
astro-ph.CO 2019-08 conditional novelty 5.0 of 10

Cosmological data limit a pre-recombination decaying dark matter fraction to at most about 2.7%, and future kSZ measurements could provide an independent test.

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