Effect of an external magnetic field on particle acceleration by a rotating black hole surrounded with quintessential energy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F18%3AA0000261" target="_blank" >RIV/47813059:19240/18:A0000261 - isvavai.cz</a>

Result on the web

<a href="https://www.worldscientific.com/doi/abs/10.1142/S0218271818500888" target="_blank" >https://www.worldscientific.com/doi/abs/10.1142/S0218271818500888</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S0218271818500888" target="_blank" >10.1142/S0218271818500888</a>

Result language

angličtina

Original language name

Effect of an external magnetic field on particle acceleration by a rotating black hole surrounded with quintessential energy

Original language description

We investigate particle motion and collisions in the vicinity of rotating black holes immersed in combined cosmological quintessential scalar field and external magnetic field. The quintessential dark-energy field governing the spacetime structure is characterized by the quintessential state parameter omega_q is an element of(-1;-1/3) characterizing its equation of state, and the quintessential field-intensity parameter c determining the static radius where the black hole attraction is just balanced by the quintessential repulsion. The magnetic field is assumed to be test field that is uniform close to the static radius, where the spacetime is nearly flat, being characterized by strength B there. Deformations of the test magnetic field in vicinity of the black hole, caused by the Ricci non-flat spacetime structure are determined. General expression of the center-of-mass energy of the colliding charged or uncharged particles near the black hole is given and discussed in several special cases. In the case of nonrotating black holes, we discuss collisions of two particles freely falling from vicinity of the static radius, or one such a particle colliding with charged particle revolving at the innermost stable circular orbit. In the case of rotating black holes, we discuss briefly particles falling in the equatorial plane and colliding in close vicinity of the black hole horizon, concentrating attention to the interplay of the effects of the quintessential field and the external magnetic field. We demonstrate that the ultra-high center-of-mass energy can be obtained for black holes placed in an external magnetic field for an infinitesimally small quintessential field-intensity parameter c; the center-of-mass energy decreases if the quintessential field-intensity parameter c increases.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GB14-37086G" target="_blank" >GB14-37086G: Albert Einstein Center for Gravitation and Astrophysics</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Modern Physics D

ISSN

0218-2718

e-ISSN

1793-6594

Volume of the periodical

27

Issue of the periodical within the volume

8

Country of publishing house

SG - SINGAPORE

Number of pages

33

Pages from-to

„1850088-1“-„1850088-1“

UT code for WoS article

000433474900013

EID of the result in the Scopus database

2-s2.0-85045763684