Is cosmological data suggesting a nonminimal coupling between matter and gravity?

• Type: Article in International Scientific Journal
• Date: 2025

Authors

Varela, MB (Author) Other; Bertolami, O (Author) FCUP

Journal

Title: Physics of the Dark Universe

Vol. 48

ISSN: 2212-6864

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-018-120

DOI: 10.1016/j.dark.2025.101861

Abstract (EN): Theoretical predictions from a modified theory of gravity with a nonminimal coupling between matter and curvature are compared to data from recent cosmological surveys. We use type Ia supernovae data from the Pantheon+ sample and the recent 5-year Dark Energy Survey (DES) data release along with baryon acoustic oscillation measurements from the Dark Energy Spectroscopic Instrument (DESI) and extended Baryon Oscillation Spectroscopic Survey (eBOSS) to constrain the modified model's parameters and to compare its fit quality to the Flat-ACDM model. We find moderate to strong evidence fora preference of the nonminimally coupled theory over the current standard model for all dataset combinations. Although the modified model is shown to be capable of matching early-time observations from the cosmic microwave background and late- time supernovae data, we find that there is still some incoherence with respect to the conclusions drawn from baryon acoustic oscillation observations.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9