4 papers
Cosmological evolution driven by polytropic fluids in an inhomogeneous spacetime
Gilberto Aguilar-Pérez, Miguel Cruz, Mohsen Fathi +2
Addressing the late-time accelerated expansion of the universe, known as the "dark energy problem", remains a central challenge in cosmology. While the cosmological constant is the…
Thermodynamics of an universe with Decaying Cold Dark Matter
Javier Juárez-Jiménez, Ana A. Avilez-López, Miguel Cruz
In this work we focus on the thermodynamics consistency of a new set of solutions emerging from a cosmology in which dark matter is able to decay into relativistic particles within…
Exploring the cosmological degeneracy between decaying dark matter model and viscous CDM
Gilberto Aguilar-Pérez, Ana A. Avilez-López, Miguel Cruz
In the context of a homogeneous and isotropic universe, we consider the degeneracy condition at the background level between two scenarios in which processes out of equilibrium are…
Black hole in a generalized Chaplygin-Jacobi dark fluid: shadow and light deflection angle
Mohsen Fathi, J. R. Villanueva, Gilberto Aguilar-Pérez +1
We investigate a generalized Chaplygin-like gas with an anisotropic equation of state, characterizing a dark fluid within which a static spherically symmetric black hole is assumed…