Compaction-driven black hole growth

ABSTRACT We study the interplay between galaxy evolution and central black hole (BH) growth using NewHorizon cosmological simulation. BH is slow when dark-matter halo below a golden mass of $M_{\rm v}\sim 10^{12}\, \rm M_\odot$, rapid above it. The early suppression primarily due to gas removal by supernova (SN) feedback in shallow potential well, predicting that BHs ${\sim}10^5\, M_\odot$ tend lie linear relation with bulge mass. Rapid allowed massive enough lock SN ejecta its deep well heated circumgalactic medium (CGM). onset these two zones triggered wet-compaction event, caused, e.g. mergers or counter-rotating streams. It brings lost angular momentum into inner-$1\, {\rm kpc}$ ‘blue nugget’ causes major transitions structural, kinematic, compositional properties, including star-formation quenching. compaction events are confined same mechanisms hot CGM. associated sinkage centre compaction-driven deepening dynamical friction. thus imprinted as threshold for growth, allowing AGN keep CGM maintain long-term not causing quenching; they both caused event hot-CGM zones.