Energy extraction and particle acceleration around a rotating black hole in quintessence

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F16%3AN0000016" target="_blank" >RIV/47813059:19240/16:N0000016 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007%2Fs10509-016-2850-9" target="_blank" >https://link.springer.com/article/10.1007%2Fs10509-016-2850-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10509-016-2850-9" target="_blank" >10.1007/s10509-016-2850-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Energy extraction and particle acceleration around a rotating black hole in quintessence

Popis výsledku v původním jazyce

We study motion and collision of particles in the gravitational field of rotating black hole immersed in quintessential dark energy characterized with the quintessential parameter $omega_q$ is an element of $(-1;-1/3)$ governing the equation of state of the dark energy, and the dimensionless quintessential field parameter $c over tilde$. We focus on the acceleration of particles due to collisional processes and show how the center of mass energy depends on the quintessential field parameter $c over tilde$. We also make comparison of the obtained results to the collisional energetics of quintessential static black holes demonstrating the crucial role of the rotation parameter a in the particle acceleration. Finally we study the dependence of the maximal value of the efficiency of energy extraction through Penrose process for rotating black hole with quintessential field parameter $c over tilde$. It is found that quintessence field decreases the energy extraction efficiency through Penrose process and when the parameter $c over tilde$ vanishes one can get the standard value of the efficiency coefficient for the Kerr black hole as $eta similar to 21 %$.

Název v anglickém jazyce

Energy extraction and particle acceleration around a rotating black hole in quintessence

Popis výsledku anglicky

We study motion and collision of particles in the gravitational field of rotating black hole immersed in quintessential dark energy characterized with the quintessential parameter $omega_q$ is an element of $(-1;-1/3)$ governing the equation of state of the dark energy, and the dimensionless quintessential field parameter $c over tilde$. We focus on the acceleration of particles due to collisional processes and show how the center of mass energy depends on the quintessential field parameter $c over tilde$. We also make comparison of the obtained results to the collisional energetics of quintessential static black holes demonstrating the crucial role of the rotation parameter a in the particle acceleration. Finally we study the dependence of the maximal value of the efficiency of energy extraction through Penrose process for rotating black hole with quintessential field parameter $c over tilde$. It is found that quintessence field decreases the energy extraction efficiency through Penrose process and when the parameter $c over tilde$ vanishes one can get the standard value of the efficiency coefficient for the Kerr black hole as $eta similar to 21 %$.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

—

Projekt

<a href="/cs/project/GB14-37086G" target="_blank" >GB14-37086G: Centrum Alberta Einsteina pro gravitaci a astrofyziku</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Astrophysics and Space Science

ISSN

0004-640X

e-ISSN

—

Svazek periodika

361

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

'269-1'-'269-8'

Kód UT WoS článku

000381114700024

EID výsledku v databázi Scopus

2-s2.0-84978745007