2020/09/30 by W. J. C. da Silva, J. E. Gonzalez, R. Silva +1 · 9 citations
Physics and Astronomy · #Astrobiology #Astrophysics #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Physics #astro-ph.CO
paper · pdf · doi:10.1140/epjp/s13360-020-00939-y
published in The European Physical Journal Plus 135(11) (Springer Science+Business Media) · 9 pages, 4 figures, 2 tables. Version accepted for publication in EPJP
openalex publication_date 2020/11/01 · arxiv created 2020/11/18 · arxiv updated 2020/11/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper, we present a unified scheme based on the fluid description of the dark sector of the universe. The scheme captures models with interaction between dark energy and dark matter, being the core of generalization the time-varying equation-of-state parameter ω(a) and the time-dependent interactions through the interaction function ε(a), where a is the scale factor. Furthermore, we propose thermodynamics constraints on this generalized class of models using the laws of thermodynamics which are combined with observational data. In order to test the observational viability of the unified model, we perform a Bayesian analysis using cosmic chronometers, type Ia supernovae, cosmic microwave background, and angular baryon acoustic oscillation measurements.