Rotating black hole solutions with quintessential energy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F17%3AA0000027" target="_blank" >RIV/47813059:19240/17:A0000027 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1140%2Fepjp%2Fi2017-11373-4" target="_blank" >https://link.springer.com/article/10.1140%2Fepjp%2Fi2017-11373-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjp/i2017-11373-4" target="_blank" >10.1140/epjp/i2017-11373-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Rotating black hole solutions with quintessential energy

Popis výsledku v původním jazyce

Quintessential dark energy with density rho and pressure p is governed by an equation of state of the form p = omega_(q)rho with the quintessential parameter omega_(q) is an element of (-1;-1/3). We derive the geometry of quintessential rotating black holes, generalizing thus the Kerr spacetimes. Then we study the quintessential rotating black hole spacetimes with the special value of omega_(q) = -2/3 when the resulting formulae are simple and easily tractable. We show that such special spacetimes can exist for the dimensionless quintessential parameter c &lt; 1/6 and determine the critical rotational parameter a(0) separating the black hole and naked singularity spacetime in dependence on the quintessential parameter c. For the spacetimes with omega_(q) = -2/3 we give all the black hole characteristics and demonstrate local thermodynamical stability. We present the integrated geodesic equations in separated form and study in details the circular geodetical orbits. We give radii and parameters of the photon circular orbits, marginally bound and marginally stable orbits. We stress that the outer boundary on the existence of circular geodesics, given by the so-called static radius where the gravitational attraction of the black hole is balanced by the cosmic repulsion, does not depend on the dimensionless spin of the rotating black hole, similarly to the case of the Kerr-de Sitter spacetimes with vacuum dark energy. We also give restrictions on the dimensionless parameters c and a of the spacetimes allowing for existence of stable circular geodesics. Finally, using numerical methods we generalize the discussion of the circular geodesics to the black holes with arbitrary quintessential parameter omega_(q).

Název v anglickém jazyce

Rotating black hole solutions with quintessential energy

Popis výsledku anglicky

Quintessential dark energy with density rho and pressure p is governed by an equation of state of the form p = omega_(q)rho with the quintessential parameter omega_(q) is an element of (-1;-1/3). We derive the geometry of quintessential rotating black holes, generalizing thus the Kerr spacetimes. Then we study the quintessential rotating black hole spacetimes with the special value of omega_(q) = -2/3 when the resulting formulae are simple and easily tractable. We show that such special spacetimes can exist for the dimensionless quintessential parameter c &lt; 1/6 and determine the critical rotational parameter a(0) separating the black hole and naked singularity spacetime in dependence on the quintessential parameter c. For the spacetimes with omega_(q) = -2/3 we give all the black hole characteristics and demonstrate local thermodynamical stability. We present the integrated geodesic equations in separated form and study in details the circular geodetical orbits. We give radii and parameters of the photon circular orbits, marginally bound and marginally stable orbits. We stress that the outer boundary on the existence of circular geodesics, given by the so-called static radius where the gravitational attraction of the black hole is balanced by the cosmic repulsion, does not depend on the dimensionless spin of the rotating black hole, similarly to the case of the Kerr-de Sitter spacetimes with vacuum dark energy. We also give restrictions on the dimensionless parameters c and a of the spacetimes allowing for existence of stable circular geodesics. Finally, using numerical methods we generalize the discussion of the circular geodesics to the black holes with arbitrary quintessential parameter omega_(q).

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/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)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal Plus

ISSN

2190-5444

e-ISSN

—

Svazek periodika

132

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

21

Strana od-do

'98-1'-'98-21'

Kód UT WoS článku

000403676100003

EID výsledku v databázi Scopus

2-s2.0-85013634442