Exponential gravity with logarithmic corrections in the presence of axion dark matter

Document detail

ID

oai:arXiv.org:2406.08831

Topic

General Relativity and Quantum Cos... Astrophysics - Cosmology and Nonga... High Energy Physics - Theory

Author

Odintsov, Sergei D. Gómez, Diego Sáez-Chillón Sharov, German S.

Year

2024

listing date

6/19/2024

Keywords

matter model dark

Metrics

Abstract

An exponential modified gravity with additional logarithmic corrections is considered with the presence of an axion-like scalar field in the role of dark matter.

Axion fields are thought to become important at late-times when the axion-like scalar field oscillates around its vacuum expectation value, mimicking dark matter behaviour.

The model is compared with the usual pressureless fluid description of dark matter.

Both models are tested with observational data including some of the latest sources, providing similar fits in comparison with the $\Lambda$CDM model.

Despite results are not statistically relevant to rule out any model, the number of free parameters still favours $\Lambda$CDM model, as shown by computing the goodness of the fits.

;Comment: 12 pages, 3 figures.

To be published in Phys.

Dark Univ

Odintsov, Sergei D.,Gómez, Diego Sáez-Chillón,Sharov, German S., 2024, Exponential gravity with logarithmic corrections in the presence of axion dark matter