Deforming regular black holes

TL;DR

This paper introduces a method to deform regular black holes with a generalized mass function, resulting in solutions that can be either regular or singular, and may violate energy conditions, impacting black hole physics.

Contribution

It presents a novel approach to deform regular black holes using linear constraints, allowing for the generation of both regular and singular solutions with potential energy condition violations.

Findings

Deformed black holes can be regular or singular.

Deformed solutions may violate the weak energy condition.

Implications for black hole accretion in cosmology.

Abstract

In this work we have deformed regular black holes which possess a general mass term described by a function which generalizes the Bardeen and Hayward mass functions. By using linear constraints in the energy-momentum tensor to generate metrics, the solutions presented in this work are either regular or singular. That is, within this approach, it is possible to generate regular or singular black holes from regular or singular black holes. Moreover, contrary to the Bardeen and Hayward regular solutions, the deformed regular black holes may violate the weak energy condition despite the presence of the spherical symmetry. Some comments on accretion of deformed black holes in cosmological scenarios are made.