Contrasting the bulk viscous model with the standard Λ CDM using Bayesian statistics
Astrophysics and Space Science, ISSN: 1572-946X, Vol: 367, Issue: 5
2022
- 2Citations
- 1Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
The causal dissipative model is a plausible choice to explain the late accelerated epoch of the universe. At the same time, Λ CDM is considered the standard model to explain the cosmological data corresponding to the late evolution of the universe. We consider a bulk viscous model in which dissipation is driven by the bulk viscosity ζ= αρ, described using the full causal Israel-Stewart theory. We computed the model parameters using the latest observational data (Pantheon). We contrasted this model with Λ CDM model for the late accelerated phase using the Bayesian inference method. The Bayes factor was obtained by calculating the likelihood for Pantheon data. Suitable prior values were assumed for model parameters to calculate the likelihood. It shows that the evidence for Λ CDM against this viscous model is very strong according to the Jeffreys scale.
Bibliographic Details
Springer Science and Business Media LLC
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