Tilted Bianchi Type V Bulk Viscous Cosmological Models with Varying $\Lambda$-Term

TL;DR

This paper explores tilted Bianchi type V cosmological models with bulk viscosity and a decreasing cosmological constant, aligning with recent supernovae observations, and discusses their physical and geometric properties.

Contribution

It introduces new tilted Bianchi type V models with bulk viscosity and a time-varying cosmological constant, extending previous cosmological solutions.

Findings

Cosmological constant decreases over time.

Models support recent supernovae data.

Physical and geometric properties are analyzed.

Abstract

Conformally flat tilted Bianchi type V cosmological models in presence of a bulk viscous fluid and heat flow are investigated. The coefficient of bulk viscosity is assumed to be a power function of mass density. The cosmological constant is found to be a decreasing function of time, which is supported by results from recent type Ia supernovae observations. Some physical and geometric aspects of the models are also discussed.