Charged fluids encircling compact objects: force representations and conformal geometries

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F20%3AA0000006" target="_blank" >RIV/47813059:19630/20:A0000006 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-6382/abbe70" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6382/abbe70</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6382/abbe70" target="_blank" >10.1088/1361-6382/abbe70</a>

Result language

angličtina

Original language name

Charged fluids encircling compact objects: force representations and conformal geometries

Original language description

Charged fluids rotating around compact objects can form unique equilibrium structures when ambient large-scale electromagnetic fields combine with strong gravity. Equatorial as well as off-equatorial toroidal structures are among such figures of equilibrium with a direct relevance for astrophysics. To investigate their geometrical shapes and physical properties in the near-horizon regime, where effects of general relativity play a significant role, we commonly employ a scheme based on the energy-momentum conservation written in a standard representation. Here, we develop its interesting alternatives in terms of two covariant force representations, both based on a hypersurface projection of the energy-momentum conservation. In a proper hypersurface, space-like forces can be defined, following from a decomposition of the fluid four-acceleration. Each of the representations provides us with an insight into properties of the fluid flow, being well reflected in related conformal hypersurface geometries; we find behaviour of centrifugal forces directly related to geodesics of these conformal hypersurfaces and their embedding diagrams. We also reveal correspondence between the charged fluid flow world-lines from an ordinary spacetime, and world-lines determined by a charged test particles equation of motion in a conformal spacetime.

Czech name

—

Czech description

—

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/GA19-03950S" target="_blank" >GA19-03950S: Testing strong gravity via black holes</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Classical and Quantum Gravity

ISSN

0264-9381

e-ISSN

1361-6382

Volume of the periodical

37

Issue of the periodical within the volume

24

Country of publishing house

GB - UNITED KINGDOM

Number of pages

21

Pages from-to

„245007-1“-„245007-21“

UT code for WoS article

000590715200001

EID of the result in the Scopus database

2-s2.0-85096826361