Rotating black hole solutions with quintessential energy

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Rotating black hole solutions with quintessential energy

Original language description

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).

Czech name

—

Czech description

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

Publication year

2017

Confidentiality

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

Name of the periodical

European Physical Journal Plus

ISSN

2190-5444

e-ISSN

—

Volume of the periodical

132

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

21

Pages from-to

'98-1'-'98-21'

UT code for WoS article

000403676100003

EID of the result in the Scopus database

2-s2.0-85013634442