J 2022

Circular motion of test particles around wormhole represented by exponential metric

TURIMOV, Bobur, Yunus TURAEV, Bobomurat AHMEDOV and Zdeněk STUCHLÍK

Basic information

Original name

Circular motion of test particles around wormhole represented by exponential metric

Authors

TURIMOV, Bobur, Yunus TURAEV, Bobomurat AHMEDOV (860 Uzbekistan) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)

Edition

Physics of the Dark Universe, 2022, 2212-6864

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/47813059:19630/22:A0000220

Organization unit

Institute of physics in Opava

UT WoS

000745266100003

Keywords in English

Papapetrou spacetime; Wormhole solution; Geodesics; Curvature invariant; Gravitational lensing

Tags

Tags

International impact, Reviewed
Změněno: 26/3/2023 16:12, Mgr. Pavlína Jalůvková

Abstract

V originále

The motion of photons, neutral and charged particles around wormhole described by exponential metric which is the solution of the Einstein-scalar field equations has been studied. It is also proven that the wormhole solution is a special case of the well-known JNW spacetime and that the scalar field corresponds to the phantom field which has the anti-gravitating repulsive feature. It is also shown that the characteristic radii, namely, innermost stable circular orbit (ISCO), marginally bound orbit (MBO) and photon sphere in the spacetime described by exponential metric are less than that obtained in the Schwarzschild spacetime. However, the size of the shadow of the wormhole is greater than the shadow of the Schwarzschild black hole. The energy efficiency in the spacetime described by exponential metric is relatively large than that in the Schwarzschild spacetime. Later it is assumed that the wormhole is embedded in the asymptotically uniform magnetic field which behaves similar to the dipole-like field near the origin. The dynamical motion of charged particles around the wormhole described by exponential metric implanted in the asymptotically uniform magnetic field has been studied assuming that charged particles are acted by gravitational and Lorentz forces, simultaneously. It is shown that the ISCO position for charged particle will be always less than that of neutral particle.