Simple parametrisation for coupled dark energy
Abstract
We propose a phenomenological generalisation of the standard model with only one extra degree of freedom that parametrises the evolution of a scalar field responsible for the cosmic acceleration. The model also foresees an additional parameter in the form of a coupling between dark energy and dark matter. This model captures a large diversity of dark energy evolutions at low redshift and could usefully complement common CPL parametrisations widely used. In this context, we have been constraining the parametrisation with data from Planck and KiDS, bringing different results between the early and late universe observations.
Keywords
Cite
@article{arxiv.2204.02339,
title = {Simple parametrisation for coupled dark energy},
author = {Vitor da Fonseca and Tiago Barreiro and Nelson J. Nunes},
journal= {arXiv preprint arXiv:2204.02339},
year = {2022}
}
Comments
11 pages, 6 figures, Contribution to the Sixteenth Marcel Grossman Conference (MG16, Rome, July, 2021), to be published by World Scientific; based on arXiv:2104.14889v2