BD-$\Lambda$CDM and Running Vacuum Models: Theoretical background and current observational status
Abstract
We present an analysis of the Brans-Dicke cosmological model with a cosmological constant and cold dark matter (BD-CDM). We find that the BD-CDM is favored by the overall cosmological data (SNIa+BAO++LSS+CMB) when it is compared with the standard model of cosmology. The BD-CDM model can be viewed from the GR perspective as a Running Vacuum Model (RVM) with a time evolving vacuum energy density. Due to this fact and also to its time evolving effective gravitational coupling, the model can alleviate the and the tensions at a time. We also present the results for different types of RVM's when they are tested in the light of the cosmological data and we show that a mild dynamics for the vacuum energy density can help to smooth out the aforementioned tensions, thus improving the performance of CDM model.
Cite
@article{arxiv.2110.07569,
title = {BD-$\Lambda$CDM and Running Vacuum Models: Theoretical background and current observational status},
author = {Javier de Cruz Perez and Joan Sola Peracaula and Adria Gomez-Valent and Cristian Moreno-Pulido},
journal= {arXiv preprint arXiv:2110.07569},
year = {2021}
}
Comments
18 pages, 1 figure. arXiv admin note: text overlap with arXiv:2102.12758