A Better Way to Reconstruct Dark Energy Models ?

Abstract

To reconstruct dark energy models the redshift $z_{eq}$, marking the end of radiation era and the beginning of matter-dominated era, can play a role as important as $z_t$, the redshift at which deceleration parameter experiences a signature flip. To implement the idea we propose a variable equation of state for matter that can bring a smooth transition from radiation to matter-dominated era in a single model. A popular $\Lambda \propto \rho$ dark energy model is chosen for demonstration but found to be unacceptable. An alternative $\Lambda \propto \rho a^3$ model is proposed and found to be more close to observation.

17 pages, 5 figures Accepted for publication in `Astrophysics and Space Science'

References in corpus (3)

• Dynamics of dark energy
• Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
• Probing for dynamics of dark energy and curvature of universe with latest cosmological observations

Cited by in corpus (5)

• Hubble expansion & Structure Formation in Time Varying Vacuum Models
• Cosmological implications and structure formation from a time varying vacuum
• Solving the main cosmological puzzles with a generalized time varying vacuum energy
• Interacting holographic dark energy models: A general approach
• Cosmological Equation of State and Interacting Energies