J 2022

Lense-Thirring effect on accretion flow from counter-rotating tori

PUGLIESE, Daniela and Zdeněk STUCHLÍK

Basic information

Original name

Lense-Thirring effect on accretion flow from counter-rotating tori

Authors

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

Edition

Monthly Notices of the Royal Astronomical Society, 2022, 0035-8711

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/47813059:19630/22:A0000195

Organization unit

Institute of physics in Opava

UT WoS

000783960400004

Keywords in English

accretion; accretion discs; black hole physics; hydrodynamics; MHD; galaxies: active; galaxies: jets

Tags

Tags

International impact, Reviewed
Změněno: 27/1/2023 09:50, Mgr. Pavlína Jalůvková

Abstract

V originále

We study the accretion flow from a counter-rotating torus orbiting a central Kerr black hole (BH). We characterize the flow properties at the turning point of the accreting matter flow from the orbiting torus, defined by the condition u(phi) = 0 on the flow toroidal velocity. The counter-rotating accretion flow and jet-like flow turning point location along BH rotational axis is given. Some properties of the counter-rotating flow thickness and counter-rotating tori energetics are studied. The maximum amount of matter swallowed by the BH from the counter-rotating tori is determined by the background properties. The fast spinning BH energetics depends mostly on BH spin rather than on the properties of the counter-rotating fluids or the tori masses. The turning point is located in a narrow orbital corona (spherical shell), for photons and matter flow constituents, surrounding the BH stationary limit (outer ergosurface), depending on the BH spin-mass ratio and the fluid initial momentum only. The turning corona for jet-like flow has larger thickness, it is separated from the torus flow turning corona and it is closer to the BH stationary limit. Turning points of matter accreting from torus and from jets are independent explicitly of the details of the accretion and tori model. The turning corona could be observable due to an increase of flow luminosity and temperature. The corona is larger on the BH equatorial plane, where it is the farthest from the central attractor, and narrower on the BH poles.