Conveners
Wednesday morning: AGN feedback
- Thomas Berlok (Leibniz Institute for Astrophysics (AIP))
I will show new X-ray results confirming the existence of the most
energetic AGN explosion ever found in a galaxy cluster. New radio data for the relic lobe will also be shown.
I will also show a mission concept for a new X-ray Probe, Line Emission Mapper, a microcalorimeter array with a large field of view sensitive to soft X-rays (exceeding Athena in grasp by factor 15), and solicit...
I will present (relatively) high resolution Chandra X-ray profiles around (again, relatively) nearby but powerful radio sources. These profiles show steeply increasing gas entropy profiles from the central black holes to the outskirts. I will explain why these profiles are not "runaway" events, but evidence of how AGN regulation works when the AGN feedback energy is dumped far from the central source.
The intra-cluster medium and its x-ray dark cavities represent some of the most direct evidence of feedback effects from AGN jets on galactic halo scales. Yet, modelling jets in order to understand the detailed process that leads to a reduction of the cooling-flow and a regulation of star formation and black hole accretion poses substantial challenges even with state-of-the-art computational...
Heating from active galactic nuclei (AGN) is thought to stabilize cool-core clusters, limiting star formation and cooling flows. We employ radiative magneto-hydrodynamic (MHD) simulations to model light AGN jet feedback with different accretion modes (Bondi-Hoyle-Lyttleton and cold accretion) in an idealised Perseus-like cluster. Independent of the probed accretion model, accretion efficiency,...
Feedback from AGN jets is critical for heating the intracluster medium (ICM) and prevent cooling catastrophe in cool-core (CC) clusters. However, the composition of AGN jets and the resulting feedback processes remain uncertain. In this talk, I will present results from our recent simulations comparing leptonic vs. hadronic jets and their implications. I will also discuss their observational...
The ability of AGN feedback to self-regulate in massive galaxies depends critically on environmental factors like the depth of the potential well and the pressure of the surrounding circumgalactic medium (CGM). I have carried out high resolution 3D hydrodynamic simulations exploring the dependence of AGN feedback in galaxies on those environmental factors with a range of halo masses. These...
