Short-duration gamma-ray bursts from Kerr-Newman black hole mergers

TL;DR

This paper explores how charged Kerr-Newman black hole mergers can produce ultra-short gamma-ray bursts through magnetic and gravitational interactions, leading to intense jets and electromagnetic counterparts to gravitational waves.

Contribution

It introduces a model for short gamma-ray bursts from charged rotating black hole mergers, emphasizing the role of magnetic fields and accretion in energy extraction and jet formation.

Findings

Characteristic results match observed GW-EM events.

Magnetic fields significantly influence jet formation and luminosity.

Remnant properties align with rare short gamma-ray burst observations.

Abstract

Black hole (BH) mergers are natural sources of gravitational waves (GWs) and are possibly associated with electromagnetic events. Such events from a charged rotating BH with an accretion on to it could be more energetic and ultra-short-lived if the magnetic force dominates the accretion process because the attraction of ionized fluid with a strong magnetic field around the rotating BH further amplifies the acceleration of the charged particle via a gyromagnetic effect. Thus a stronger magnetic field and gravitational pull will provide an inward force to any fluid displaced in the radial direction and move it toward the axis of rotation with an increasing velocity. After many twists during rotation and the existence of restoring agents, Such events could produce a narrow intense jet starts in the form of Poynting flux along the axis of rotation resembling the Blandford-Znajek (BZ) mechanism. We investigated a charged rotating BH and obtained characteristic results (e.g., the remnant mass, magnetic field strength, luminosity, opening angle, viewing angle, and variation of viewing angle on the SGRB luminosity detection) that have a nice coincidence with rare events having GW associated with EM counterparts. This study gives a new insight into events with a strongly magnetized disk dominating the accretion process of energy extraction.