J 2024

Inversion points of the accretion flows onto super-spinning Kerr attractors

PUGLIESE, Daniela and Zdeněk STUCHLÍK

Basic information

Original name

Inversion points of the accretion flows onto super-spinning Kerr attractors

Authors

PUGLIESE, Daniela (380 Italy, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)

Edition

European Physical Journal C, New York (USA), SPRINGER, 2024, 1434-6044

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 4.400 in 2022

Organization unit

Institute of physics in Opava

UT WoS

001168082000001

Keywords in English

accretion flows;Kerr super-spinning attractor;spin;orbiting fluids;corona

Tags

Tags

International impact, Reviewed
Změněno: 16/1/2025 11:58, Mgr. Pavlína Jalůvková

Abstract

V originále

We study the accretion flows towards a central Kerr super-spinning attractor, discussing the formation of the flow inversion points, defined by condition uϕ=0 on the particles flow axial velocity. We locate two closed surfaces, defining inversion coronas (spherical shells), surrounding the central attractor. The coronas analysis highlights observational aspects distinguishing the central attractors and providing indications on their spin and the orbiting fluids. The inversion corona is a closed region, generally of small extension and thickness, which is for the counter-rotating flows of the order of ≲1.4M (central attractor mass) on the vertical rotational axis. There are no co-rotating inversion points (from co-rotating flows). The results point to strong signatures of the Kerr super-spinars, provided in both accretion and jet flows. With very narrow thickness, and varying little with the fluid initial conditions and the emission process details, inversion coronas can have remarkable observational significance for primordial Kerr super-spinars predicted by string theory. The corona region closest to the central attractor is the most observably recognizable and active part, distinguishing black holes solutions from super-spinars. Our analysis expounds the Lense–Thirring effects and repulsive gravity effects in the super-spinning ergoregions.