Innermost stable circular orbit of charged particles in Reissner-Nordstrom, Kerr-Newman, and Kerr-Sen spacetimes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00549278" target="_blank" >RIV/67985815:_____/21:00549278 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.103.024016" target="_blank" >https://doi.org/10.1103/PhysRevD.103.024016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.103.024016" target="_blank" >10.1103/PhysRevD.103.024016</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Innermost stable circular orbit of charged particles in Reissner-Nordstrom, Kerr-Newman, and Kerr-Sen spacetimes

Popis výsledku v původním jazyce

In this article we study the innermost stable circular orbit (ISCO) of electrically charged particles in the electrically charged Reissner-Nordstrom spacetime, the Kerr-Newman spacetime and the Kerr-Sen spacetime. We find that the radius of the ISCO increases with an increasing particle-black hole charge product vertical bar qQ vertical bar in the case of attractive Coulomb interaction qQ < 0. For repulsive Coulomb interaction, the ISCO radius first decreases to a minimum and then increases again, until it diverges as the charge product approaches one. If the charge Q of the black hole is very small, the minimum of the ISCO radius lies at qQ = 0. Repulsive and attractive Coulomb interactions will always increase the ISCO radius in this limit. Stable bound orbits of charged particles cease to exist in the Reissner-Nordstrom and Kerr-Newman spacetime for qQ >= 1. In the Kerr-Sen spacetime the limiting case depends on the charge of the black hole and if dilaton coupling is applied to the test particle. We find qQ >= 1 + Q(2) without dilaton-coupling and qQ >= 1 + Q(2) with dilaton coupling alpha = 1.

Název v anglickém jazyce

Innermost stable circular orbit of charged particles in Reissner-Nordstrom, Kerr-Newman, and Kerr-Sen spacetimes

Popis výsledku anglicky

In this article we study the innermost stable circular orbit (ISCO) of electrically charged particles in the electrically charged Reissner-Nordstrom spacetime, the Kerr-Newman spacetime and the Kerr-Sen spacetime. We find that the radius of the ISCO increases with an increasing particle-black hole charge product vertical bar qQ vertical bar in the case of attractive Coulomb interaction qQ < 0. For repulsive Coulomb interaction, the ISCO radius first decreases to a minimum and then increases again, until it diverges as the charge product approaches one. If the charge Q of the black hole is very small, the minimum of the ISCO radius lies at qQ = 0. Repulsive and attractive Coulomb interactions will always increase the ISCO radius in this limit. Stable bound orbits of charged particles cease to exist in the Reissner-Nordstrom and Kerr-Newman spacetime for qQ >= 1. In the Kerr-Sen spacetime the limiting case depends on the charge of the black hole and if dilaton coupling is applied to the test particle. We find qQ >= 1 + Q(2) without dilaton-coupling and qQ >= 1 + Q(2) with dilaton coupling alpha = 1.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GC19-01137J" target="_blank" >GC19-01137J: Největší černé díry na obloze: vznik a vývoj struktur na škálách horizontu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

103

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

024016

Kód UT WoS článku

000606732400006

EID výsledku v databázi Scopus

2-s2.0-85099301282