The gravitational collapse of the dust toward the newly formed rotating black holes in Kerr and 4-D Einstein-Gauss-Bonnet Gravities

TL;DR

This study models dust collapse into black holes using relativistic hydrodynamics in General and Einstein-Gauss-Bonnet gravity, analyzing how black hole rotation and coupling constants affect accretion dynamics and curvature effects.

Contribution

It introduces a numerical framework for simulating dust collapse in modified gravity theories, highlighting the impact of rotation and coupling parameters on accretion and curvature.

Findings

Black hole rotation parameter a influences accretion dynamics.

EGB coupling constant alpha affects curvature and accretion rates.

Mass accretion rate varies significantly with parameters.

Abstract

Studying the gravitational collapse of dust particles toward newly formed black holes has gained popularity following the observation of gravitational waves resulting from the merger of black holes. In this paper, we focus on modelling the descent of dust debris toward a black hole using a numerical code that incorporates relativistic hydrodynamics in the framework of General and Einstein-Gauss Bonnet gravity. We explore the influence of various parameters, such as the black hole's rotation parameter a and the EGB coupling constant alpha, on the curvature effects observed. Both parameters significantly impact the dynamics of the accretion disk formed around the black holes. Furthermore, we discuss the gravitational collapsing process in two distinct scenarios. It is also observed that the mass accretion rate is significantly influenced by these two parameters. The rate at which mass is accreted toward a black hole directly impacts the black hole's growth and evolutionary trajectory.