J 2022

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

PUGLIESE, Daniela a Zdeněk STUCHLÍK

Základní údaje

Originální název

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

Autoři

PUGLIESE, Daniela (380 Itálie, domácí) a Zdeněk STUCHLÍK (203 Česká republika, domácí)

Vydání

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

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Kód RIV

RIV/47813059:19630/22:A0000195

Organizační jednotka

Fyzikální ústav v Opavě

DOI

http://dx.doi.org/10.1093/mnras/stac782

UT WoS

000783960400004

Klíčová slova anglicky

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

Štítky

RIV23, UF

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 27. 1. 2023 09:50, Mgr. Pavlína Jalůvková

Anotace

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.
Zobrazeno: 25. 12. 2024 08:50