The region interior to the event horizon of the Regular Hayward Black Hole

TL;DR

This paper investigates the interior structure of the regular Hayward black hole using Painlevé-Gullstrand coordinates, comparing particle trajectories and velocities with those in singular black holes, revealing differences due to regularity at the center.

Contribution

It provides a detailed analysis of particle motion inside the regular Hayward black hole, highlighting how regularity affects trajectories and velocities compared to singular black holes.

Findings

Particle trajectories differ near the center depending on regularity.

In the modified Hayward black hole, particles move faster and surface gravity is smaller.

Trajectories inside the regular Hayward black hole differ from those in Schwarzschild and Reissner-Nordstrom black holes.

Abstract

The Painlev\'e-Gullstrand coordinates allow us to explore the interior of the regular Hayward black hole. The behavior of an infalling particle in traversing the Hayward black hole is compared with the one inside the Schwarzschild and Reissner-Nordstrom singular black holes. When approaching the origin the test particle trajectories present differences depending if the center is regular or singular. The velocities of the infalling test particle into the modified Hayward black hole are analyzed as well. As compared with the normal Hayward, in the modified Hayward black hole the particle moves faster and the surface gravity is smaller.