Viscous cosmological fluids and large-scale structure
arXiv:2412.02276
Abstract
In this paper, we study the viscous fluid cosmological model that when certain conditions are invoked mimics the CDM model. The background equations governing the evolution of viscous interacting fluids in a multifluid system are derived. The Markov Chain Monte Carlo (MCMC) simulation is applied to constrain the best-fit cosmological parameters with Supernova Type 1a data. In addition, linear cosmological perturbations are investigated in a dust-matter-dominated frame using a covariant formalism approach. It is evident from the perturbation results obtained that the model predicts the disintegration of bound structures of large-scale structures in the late-time universe.
Published in SAIP2023 Proceedings, South African Institute of Physics