Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state
Abstract
In this work we have used the recent cosmic chronometers data along with the latest estimation of the local Hubble parameter value, at 2.4\% precision as well as the standard dark energy probes, such as the Supernovae Type Ia, baryon acoustic oscillation distance measurements, and cosmic microwave background measurements (PlanckTT lowP) to constrain a dark energy model where the dark energy is allowed to interact with the dark matter. A general equation of state of dark energy parametrized by a dimensionless parameter `' is utilized. From our analysis, we find that the interaction is compatible with zero within the 1 confidence limit. We also show that the same evolution history can be reproduced by a small pressure of the dark matter.
Keywords
Cite
@article{arxiv.1705.09278,
title = {Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state},
author = {Weiqiang Yang and Narayan Banerjee and Supriya Pan},
journal= {arXiv preprint arXiv:1705.09278},
year = {2017}
}
Comments
Accepted for publication in Physical Review D