Linking Macro, Meso, and Micro Scales in Multiphase AGN Feeding and Feedback

Abstract

Supermassive black hole (SMBH) feeding and feedback processes are often considered as disjoint and studied independently at different scales, both in observations and simulations. We encourage to adopt and unify three physically-motivated scales for feeding and feedback (micro - meso - macro ~ mpc - kpc - Mpc), linking them in a tight multiphase self-regulated loop. We pinpoint the key open questions related to this global SMBH unification problem, while advocating for the extension of novel mechanisms best observed in massive halos (such as chaotic cold accretion) down to low-mass systems. To solve such challenges, we provide a set of recommendations that promote a multiscale, multiwavelength, and interdisciplinary community.

Published in Nature Astronomy (authors' version after final referee iteration)

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• LOFAR Observations of X-ray Cavity Systems
• The metal content of the hot atmospheres of galaxy groups
• The MURALES survey. IV. Searching for nuclear outflows in 3C radio galaxies at z < 0.3 with MUSE observations
• Radio galaxies in galaxy groups: kinematics, scaling relations and AGN feedback
• A molecular absorption line survey toward the AGN of Hydra-A
• WISDOM project -- VIII. Multi-scale feedback cycles in the brightest cluster galaxy NGC 0708
• Observational Evidence for Enhanced Black Hole Accretion in Giant Elliptical Galaxies
• The Clusters Hiding in Plain Sight (CHiPS) survey: Complete sample of extreme BCG clusters
• X-ray obscuration from a variable ionized absorber in PG 1114+445
• The Clusters Hiding in Plain Sight (CHiPS) survey: CHIPS1911+4455, a Rapidly-Cooling Core in a Merging Cluster
• Multiphase Powerful Outflows Detected in High-z Quasars
• Conceptual Analogies Between Multi-Scale Feeding and Feedback Cycles in Supermassive Black Hole and Cancer Environments