Hidden Cooling Flows in Clusters of Galaxies III: Accretion onto the Central Black Hole

Recently, we have uncovered Hidden Cooling Flows (HCF) in the X-ray spectra of central Brightest Galaxies 11 clusters, 1 group and 2 elliptical galaxies. Here report such flows a further 15 objects, consisting 8 3 groups, ellipticals Red Nugget. The mass cooling rates are about Msun/yr ellipticals, to 20 groups 100 regular clusters. Nugget, MRK1216, has an HCF 10 Msun/yr. We review fate cooled gas investigate how some it might accrete onto black hole. is likely be very cold fragmented into low stars smaller objects before being swallowed whole, with little luminous output. If scenario correct operates at few then may host fastest growing holes redshift Universe. briefly discuss relevance growth early galaxies holes.