2022/04/05 by Vitor da Fonseca, Tiago Barreiro, da Fonseca, Vitor +3
Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.2204.02339
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
arxiv created 2022/04/05 · arxiv updated 2022/04/06
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.