J 2012

String loops in the field of braneworld spherically symmetric black holes and naked singularities

KOLOŠ, Martin and Zdeněk STUCHLÍK

Basic information

Original name

String loops in the field of braneworld spherically symmetric black holes and naked singularities

Edition

Journal of Cosmology and Astroparticle Physics, GB - Spojené království Velké Británie a, 2012, 1475-7516

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Organization unit

Faculty of Philosophy and Science in Opava

UT WoS

000310793700009

Keywords in English

GR black holes; Modified gravity; Particle acceleration

Tags

Tags

International impact, Reviewed
Změněno: 13/1/2021 15:20, Mgr. Pavlína Jalůvková

Abstract

V originále

We study motion of current-carrying string loops in the field of braneworld spherically symmetric black holes and naked singularities. The spacetime is described by the Reissner-Nordström geometry with tidal charge b reflecting the non-local tidal effects coming from the external dimension; both positive and negative values of the spacetime parameter b are considered. We restrict attention to the axisymmetric motion of string loops when the motion can be fully governed by an appropriately defined effective potential related to the energy and angular momentum of the string loops. In dependence on these two constants of the motion, the string loops can be captured, trapped, or can escape to infinity. In close vicinity of stable equilibrium points at thecentre of trapped states the motion is regular. We describe how it is transformed to chaotic motion with growing energy of the string loop. In the field of naked singularities the trapped states located off the equatorial plane of the sys