Ehlert, Kristian
[VerfasserIn]
;
Pfrommer, Christoph
[AkademischeR BetreuerIn];
Šijački, Debora
[Sonstige Person, Familie und Körperschaft];
Ruszkowski, Mateusz
[AkademischeR BetreuerIn]Potsdam
Simulations of active galactic nuclei feedback with cosmic rays and magnetic fields
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Medientyp:
E-Book;
Hochschulschrift
Titel:
Simulations of active galactic nuclei feedback with cosmic rays and magnetic fields
Weitere Titel:
Übersetzung des Haupttitels: Simulationen vom Heizen von Galaxienhaufen durch aktive Galaxienkerne mit kosmischer Strahlung und Magnetfeldern
Hochschulschrift:
Dissertation, Universität Potsdam, 2022 (kumulative Dissertation)
Anmerkungen:
kumulative Dissertation
Beschreibung:
The central gas in half of all galaxy clusters shows short cooling times. Assuming unimpeded cooling, this should lead to high star formation and mass cooling rates, which are not observed. Instead, it is believed that condensing gas is accreted by the central black hole that powers an active galactic nuclei jet, which heats the cluster. The detailed heating mechanism remains uncertain. A promising mechanism invokes cosmic ray protons that scatter on self-generated magnetic fluctuations, i.e. Alfvén waves. Continuous damping of Alfvén waves provides heat to the intracluster medium. Previous work has found steady state solutions for a large sample of clusters where cooling is balanced by Alfvénic wave heating. To verify modeling assumptions, we set out to study cosmic ray injection in three-dimensional magnetohydrodynamical simulations of jet feedback in an idealized cluster with the moving-mesh code arepo. We analyze the interaction of jet-inflated bubbles with the turbulent magnetized intracluster medium. Furthermore, jet dynamics ...