Dynamical dark energy from F(R) gravity models unifying inflation with dark energy: Confronting the latest observational data
Odintsov S.D. Oikonomou V.K. Sharov G.S.
February 2026Elsevier B.V.
Journal of High Energy Astrophysics
2026#50
A class of viable F(R) gravity models which can provide a unified description of inflation with the dark energy era is confronted with the latest observational data on the dark energy era. These models have the unique characteristic that the de Sitter scalaron mass in the Einstein frame counterpart theory is a monotonic function of the curvature, which renders them viable descriptions for both the inflationary and the late-time acceleration eras. We also compare these models with other well-known viable F(R) gravity models and with the Λ-Cold-Dark-Matter model. As we show, the most phenomenologically successful models are those which deviate significantly from the Λ-Cold-Dark-Matter model. Also some of the models presented, provide a statistically favorable description of the dark energy eras, compared with the exponential F(R) gravity model and of course compared with the Λ-Cold-Dark-Matter model. All the models we present in this article are confronted with the observational data from the Planck collaboration, the Pantheon plus data from Type Ia supernovae, the two rounds of observations of the Dark Energy Spectroscopic Instrument, data from baryon acoustic oscillations and the Hubble constant measurements. As we show, two of the models are statistically favorable by the data.
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Institute of Space Sciences (ICE, CSIC), C. Can Magrans s/n, Barcelona, 08193, Spain
ICREA, Passeig Luis Companys, 23, Barcelona, 08010, Spain
Institut dEstudis Espacials de Catalunya (IEEC), Castelldefels, Catalonia, Barcelona, 08860, Spain
L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
Tver state university, Sadovyj per. 35, Tver, 170002, Russian Federation
International Laboratory for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics (TUSUR), Tomsk, 634050, Russian Federation
Institute of Space Sciences (ICE
ICREA
Institut dEstudis Espacials de Catalunya (IEEC)
L.N. Gumilyov Eurasian National University
Department of Physics
Tver state university
International Laboratory for Theoretical Cosmology
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026