Work

Spherically symmetric gravitational collapse in the background of Chaplygin gas

Year: 2025

Type: article

Abstract: In this paper, we consider the spherically symmetric shear-free gravitational collapse in the background of Chaplygin gas as dark energy. In the interior of a star, the dark energy components are assumed to be generalized and modified Chaplygin gas. The equation of state for the generalized and modified Chaplygin gas is [Formula: see text] and [Formula: see text], where [Formula: see text], [Formula: see text] and [Formula: see text] are model parameters. The exterior of the star is considered to be a Schwarzschild de Sitter/anti-de Sitter metric, and discuss the junction conditions. We discuss the dynamics of singularity formation by calculating the collapsing rate of the system. We discuss the singularity formation in both forms of the Chaplygin gas case and observe that this model possesses the central singularity; also, it is found that such collapsing fluids favor the formation of black holes.

Source: International Journal of Geometric Methods in Modern Physics

DOI: 10.1142/s0219887825501749

Authors: Anjali Pandey, Rajesh Kumar, Sudhir Kumar Srivastava

Institution: Deen Dayal Upadhyaya Gorakhpur University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Department of Science and Technology, Ministry of Science and Technology, India

Award: G5224293518