3 papers
astro-ph.CO2025
A Dark Matter Model with Quadratic Equation of State: Background Evolution and Structure Formation
Kazem Rezazadeh, Ebrahim Yusofi, Alireza Talebian
We propose that dark matter (DM) possesses a quadratic equation of state, which becomes significant at high densities, altering the Universe's evolution during its early stages. We…
gr-qc2025
Stability and Thermodynamics of a Generalized Power-Law Dark Energy Model
S. Kazemi, M. A. Ramzanpour, E. Yusofi +1
We investigate a generalized power-law dark energy equation of state of the form in a flat FLRW universe, analyzing its dynamical stability and thermodynamic consist…
astro-ph.CO2025
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…