Dark Matter-Dark Energy Interaction and the Shape of Cosmic Voids

TL;DR

This paper investigates how the interaction between dark matter and dark energy influences the shape of cosmic voids, revealing that such interaction increases their ellipticity based on observationally constrained models.

Contribution

It introduces a study of dark matter-dark energy interaction effects on cosmic void shapes using a dynamical dark energy model constrained by data.

Findings

Ellipticity of cosmic voids increases with dark matter-dark energy interaction.

The study employs linear growth of density perturbations in an interacting dark energy model.

Results are consistent with observational data on cosmic void shapes.

Abstract

Interaction between dark matter and dark energy as one of not completely solved problems in cosmology has been studied extensively. This interaction affects the cosmic structures. In this regard, the shape of cosmic voids can be influenced by the dark matter and dark energy interaction. Here, employing the dynamical dark energy model constrained by the observational data, we study the effects of this interaction on the ellipticity of cosmic voids. To this aim, we apply the linear growth of density perturbation in the presence of interaction. The probability density distribution for the ellipticity of cosmic voids has been investigated. The results confirm that the ellipticity of cosmic voids increases when the dark matter and dark energy interaction is considered.