J 2022

Evolution of braneworld Kerr-Newman naked singularities

BLASCHKE, Martin, Zdeněk STUCHLÍK and Sudipta HENSH

Basic information

Original name

Evolution of braneworld Kerr-Newman naked singularities

Authors

BLASCHKE, Martin (203 Czech Republic, belonging to the institution), Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution) and Sudipta HENSH (356 India, belonging to the institution)

Edition

Physical Review D, 2022, 2470-0010

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/47813059:19630/22:A0000179

Organization unit

Institute of physics in Opava

UT WoS

000810510200010

Keywords in English

braneworld ;Kerr-Newman naked singularities;charched black holes;particles

Tags

International impact, Reviewed

Links

GA19-03950S, research and development project.
Změněno: 6/2/2023 10:04, Mgr. Pavlína Jalůvková

Abstract

V originále

We study evolution of the braneworld Kerr-Newman (K-N) naked singularities, namely their mass M, spin a, and tidal charge b characterizing the role of the bulk space, due to matter in-falling from Keplerian accretion disk. We construct the evolution in two limiting cases applied to the tidal charge. In the first case we assume b = const during the evolution, in the second one we assume that the dimensionless tidal charge beta b/M-2 = const. For positive values of the tidal charge the evolution is equivalent to the case of the standard K-N naked singularity under accretion of electrically neutral matter. We demonstrate that counterrotating accretion always converts a K-N naked singularity into an extreme K-N black hole and that the corotating accretion leads to a variety of outcomes. The conversion to an extreme K-N black hole is possible for naked singularity with dimensionless tidal charge beta < 0.25, and beta is an element of (0.25, 1) with sufficiently low spin. In other cases the accretion ends in a transcendental state. For 0.25 < beta < 1 this is a mining unstable K-N naked singularity enabling formally unlimited energy extraction from the naked singularity. In the case of beta > 1, the corotating accretion creates unlimited torodial structure of mater orbiting the naked singularity. Both nonstandard outcomes of the corotating accretion imply a transcendence of such naked singularity due to nonlinear gravitational effects.