End equilibrium state of a spherical gravitational collapse in the presence of matter and scalar field

TL;DR

This paper models the end state of spherical gravitational collapse as a static spacetime formed by a coupled matter and scalar field, representing dark matter and dark energy, respectively, providing new solutions for JMN spacetimes.

Contribution

It introduces a novel model of gravitational collapse end states involving a coupled matter-scalar field system, deriving solutions for scalar fields and potentials in JMN spacetimes.

Findings

Demonstrates that a two-component fluid can lead to equilibrium spacetimes.

Derives explicit solutions for scalar fields and potentials in JMN spacetimes.

Shows the influence of dark energy on structure formation in collapse scenarios.

Abstract

We explore the possibilities of modeling a spherically symmetric static spacetime that can emerge as the end state of gravitational collapse, by considering it to be seeded by a composite fluid made of matter and a scalar field. In this scenario, the matter represents dark matter, while the scalar field represents dark energy. On certain scales, dark energy is believed to significantly influence the structure formation of dark matter. Various models describe the possible impacts of dark energy on structure formation under different scenarios. By investigating an inhomogeneous scalar field representing dark energy, coupled with dark matter, we demonstrate that this two-component fluid can seed spacetimes forming the final equilibrium state. We derive solutions for the scalar field and potential for Joshi-Malafarina-Narayan (JMN) spacetimes.