Magnification effect of Kerr metric by configurations of collisionless particles in non-isotropic kinetic equilibria

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F18%3AA0000263" target="_blank" >RIV/47813059:19240/18:A0000263 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1140%2Fepjp%2Fi2018-12043-9" target="_blank" >https://link.springer.com/article/10.1140%2Fepjp%2Fi2018-12043-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjp/i2018-12043-9" target="_blank" >10.1140/epjp/i2018-12043-9</a>

Result language

angličtina

Original language name

Magnification effect of Kerr metric by configurations of collisionless particles in non-isotropic kinetic equilibria

Original language description

A test fluid composed of relativistic collisionless neutral particles in the background of Kerr metric is expected to generate non-isotropic equilibrium configurations in which the corresponding stress-energy tensor exhibits pressure and temperature anisotropies. This arises as a consequence of the constraints placed on single-particle dynamics by Killing tensor symmetries, leading to a peculiar non-Maxwellian functional form of the kinetic distribution function describing the continuum system. Based on this outcome, in this paper the generation of Kerr-like metric by collisionless N-body systems of neutral matter orbiting in the field of a rotating black hole is reported. The result is obtained in the framework of covariant kinetic theory by solving the Einstein equations in terms of an analytical perturbative treatment whereby the gravitational field is decomposed as a prescribed background metric tensor described by the Kerr solution plus a self-field correction. The latter one is generated by the uncharged fluid at equilibrium and satisfies the linearized Einstein equations having the non-isotropic stress-energy tensor as source term. It is shown that the resulting self-metric is again of Kerr type, providing a mechanism of magnification of the background metric tensor and its qualitative features.

Czech name

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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

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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

European Physical Journal Plus

ISSN

2190-5444

e-ISSN

—

Volume of the periodical

133

Issue of the periodical within the volume

5

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

„203-1“-„203-13“

UT code for WoS article

000434466200001

EID of the result in the Scopus database

2-s2.0-85047604754