Growth of matter perturbations in the Interacting Dark Energy/Dark Matter Scenarios

Understand

In this study, we investigate two widely recognized Interacting Dark Energy(IDE) models and assess their compatibility with observational data, focusing on the growth rate of matter perturbations.

• We explore IDE models with different equations of state(EoS) parameters for Dark Energy (DE), including the CPL parameterization and a constant value for $w_{\mathrm{de}}$.
• To constrain the parameters of the IDE models using background data, we employ a Markov Chain Monte Carlo(MCMC) analysis.
• Our results show that both IDE-I and IDE-II models are Compatible with observational data, although with slight variations influenced by the homogeneity or clustering of DE.