English

Fab-Four cosmography to tackle the Hubble tension

General Relativity and Quantum Cosmology 2023-06-29 v1 Cosmology and Nongalactic Astrophysics

Abstract

In the context of the Fab-Four theory of gravity in a Friedmann-Lema\^itre-Robertson-Walker background, in this work we use the cosmography approach to study a particular self-tuning filter solution focused on a zero-curvature fixed point to study the H0H_0 tension. In this scheme, the equations restrict the universe's evolution to certain scenarios, including radiation-like expansion, matter-like expansion, and late-time acceleration. Furthermore, we build the cosmographic series of the Fab-Four theory to obtain the kinematic parameters as the Hubble constant H0H_0 and the deceleration parameter q0q_0 for all the scenarios mentioned. Finally, we compare our results to find that it is possible to alleviate the current discrepancy on H0H_0 by considering specific requirements on the free parameters of the Fab-Four theory through a self-tuning filter.

Keywords

Cite

@article{arxiv.2306.14855,
  title  = {Fab-Four cosmography to tackle the Hubble tension},
  author = {Celia Escamilla-Rivera and José María de Albornoz-Caratozzolo and Sebastián Nájera},
  journal= {arXiv preprint arXiv:2306.14855},
  year   = {2023}
}

Comments

12 pages, 1 table. Version accepted in Universe