MAD UFOs: Magnetically Arrested Discs with persistent Ultra-Fast Outflows

0581744 - ASÚ 2024 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Suková, Petra - Zajaček, M. - Karas, Vladimír
MAD UFOs: Magnetically Arrested Discs with persistent Ultra-Fast Outflows.
Proceedings of RAGtime 23/25: Workshops on black holes and neutron stars. Opava: Silesian University, 2023, s. 109-117. Publications of the Institute of Physics, 10. ISBN 978-80-7510-577-6.
[RAGtime /23.-25./. Opava (CZ), 27.11.2023-01.12.2023]
Grant ostatní: AV ČR(CZ) LQ100032102
Program: Prémie Lumina quaeruntur
Výzkumná infrastruktura: e-INFRA CZ - 90140
Institucionální podpora: RVO:67985815
Klíčová slova: accretion discs * black holes * active galactic nuclei
Obor OECD: Astronomy (including astrophysics,space science)
https://proceedings.physics.cz/wp-content/uploads/2024/01/RAGtime25_online_final.pdf

We study an outflow that develops in the MAD state in 3D GRMHD simulations. We show that the outflow can be accelerated to
relativistic velocities and persist over the course of our simulation. We compare the properties of the outflow from MAD discs with those launched by orbiting secondary at close orbit. The main difference is that the orbiting body launches a more coherent, quasiperiodic ultrafast outflow at lower velocities (v < 0.5c) while the outflow launched in the MAD state (without the body) has a stochastic behaviour and has anapproximately flat velocity distribution between lower anf higher outflow velocities, 0.2c < v < 0.3c and v > 0.5c.
Trvalý link: https://hdl.handle.net/11104/0349907