Constraints on coupling constant between dark energy and dark matter

Abstract

We have investigated constraints on the coupling between dark matter and the interacting Chaplygin gas. Our results indicate that the coupling constant $c$ between these two entities can take arbitrary values, which can be either positive or negative, thus giving arbitrary freedom to the inter-conversion between Chaplygin gas and dark matter. Thus our results indicate that the restriction $0<c<1$ on the coupling constant occurs as a very special case. Our analysis also supports the existence of phantom energy under certain conditions on the coupling constant.

16 Pages, 3 figures

References in corpus (8)

• Can dark energy evolve to the Phantom?
• Charged Black Holes in Phantom Cosmology
• Observational constraints on the dark energy and dark matter mutual coupling
• Interacting Phantom Energy
• Interacting Modified Variable Chaplygin Gas in Non-flat Universe
• Variable Modified Chaplygin Gas and Accelerating Universe
• Interacting Dark Energy with Inhomogeneous Equation of State
• Cosmic coincidence problem and variable constants of physics

Cited by in corpus (3)

• Holographic dark energy with varying gravitational constant
• Cosmic coincidence problem and variable constants of physics
• Testing the (generalized) Chaplygin gas model with the Lookback time-Redshift data