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

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Authors

SUKOVÁ Petra ZAJAČEK Michal KARAS Vladimír

Year of publication 2023
Type Article in Proceedings
Conference Proceedings of RAGtime 23–25: Workshops on black holes and neutron stars
MU Faculty or unit

Faculty of Science

Citation
Web https://proceedings.physics.cz/wp-content/uploads/2024/01/RAGtime25_online_final.pdf
Keywords Accretion discs; Active Galactic Nuclei; black holes; MHD simulations; outflows
Description We study an outflow that develops in the MAD state in 3D GRMHD simulations. We show that the outflow can be accelerated to\nrelativistic 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.
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