2023/10/31 by Sergei D. Odintsov, Odintsov, Sergei D., Diego Sáez-Chillón Gómez +3 · 1 citation
Physics and Astronomy · Earth and Planetary Sciences · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Dark Matter and Cosmic Phenomena
paper · pdf · doi:10.48550/arxiv.2310.20302
The cosmological evolution within the framework of exponential F(R) gravity is analysed by assuming two forms for dark matter: (a) a standard dust-like fluid and (b) an axion scalar field. As shown in previous literature, an axion-like field oscillates during the cosmological evolution but can play the role of dark matter when approaching the minimum of its potential. Both scenarios are confronted with recent observational data including the Pantheon Type Ia supernovae, Hubble parameter estimations (Cosmic Chronometers), Baryon Acoustic Oscillations and Cosmic Microwave Background distances. The models show great possibilities in describing these observations when compared with the ΛCDM model, supporting the viability of exponential F(R) gravity. The differences between both descriptions of dark matter is analysed.