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

• Autoři: SUKOVÁ Petra; ZAJAČEK Michal; KARAS Vladimír
• Rok publikování: 2023
• Druh: Článek ve sborníku
• Konference: Proceedings of RAGtime 23–25: Workshops on black holes and neutron stars
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• www: https://proceedings.physics.cz/wp-content/uploads/2024/01/RAGtime25_online_final.pdf
• Klíčová slova: Accretion discs; Active Galactic Nuclei; black holes; MHD simulations; outflows
• Popis: 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.

Související projekty

• Weather effects in using disk continuum time delays in active galactic nuclei to measure the expansion rate of the Universe / Role mraků při využití zpoždění kontinua v aktivních galaxiích k měření rychlosti rozpínání vesmíru