Primordial magnetic fields in theories of gravity with non-minimal coupling between curvature and matter

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Bertolami, O (Author) FCUP; Lima, MM (Author) Other; Mena, FC (Author) Other

Journal

Title: General Relativity and Gravitation

Vol. 54

ISSN: 0001-7701

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

Other information

Authenticus ID: P-00W-ZNM

DOI: 10.1007/s10714-022-02968-7

Abstract (EN): The existence of magnetic fields in the universe is unmistakable. They are observed at all scales from stars to galaxy clusters. However, the origin of these fields remains enigmatic. It is believed that magnetic field seeds may have emerged from inflation, under certain conditions. This possibility is analised in the context of an alternative theory of gravity with non-minimal coupling between curvature and matter. We find, through the solution of the generalised Maxwell equations in the context of non-minimal models, that for general slow-roll inflationary scenarios with low reheating temperatures, T-RH similar or equal to 10(10) GeV, the generated magnetic fields can be made compatible with observations at large scales, lambda similar to 1Mpc.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15