Collapsing Inhomogeneous Dust Fluid in the Background of Dark Energy

TL;DR

This paper investigates the gravitational collapse of an inhomogeneous dust star in a dark energy background, analyzing separate and combined effects of dark matter and dark energy, including anisotropic forms.

Contribution

It introduces a comprehensive model of inhomogeneous dust collapse considering dark energy in various forms and interaction scenarios, extending previous studies.

Findings

Collapse behavior varies with dark energy form and interaction

Dark energy anisotropic fluid influences collapse dynamics

Results align with previous anisotropic dark energy models

Abstract

In the present work, gravitational collapse of an inhomogeneous spherical star model, consisting of inhomogeneous dust fluid (dark matter) in the background of dark energy is considered. The collapsing process is examined first separately for both dark matter and dark energy and then under the combined effect of dark matter and dark energy with or without interaction. The dark energy is considered in the form of perfect fluid and both marginally and non-marginally bound cases are considered for the collapsing model. Finally dark energy in the form of anisotropic fluid is investigated and it is found to be similar to ref. [12]