Interpreting the possible break in the black hole–bulge mass relation

摘要: Recent inspections of local available data suggest that the almost linear relation between stellar mass spheroids (Msph) and super massive black holes (BHs), residing at their centres, shows a break below Msph ? 1010?M?, with steeper, about quadratic smaller masses. We investigate physical mechanisms responsible for change in slope this relation, by comparing results semi-analytic model galaxy formation morgana, which already predicted such its original formulation. find is mostly induced effective feedback star-forming bulges. The shape instead quite insensitive to other connected BH accretion as disc instabilities, mergers, active galactic nucleus (AGN) feedback, or even exact modelling on BH, direct through reservoir low angular momentum gas. Our support scenario where most stars form component galaxies are carried bulges mergers while BHs star spheroidal component. Therefore, produces stronger outflows than discs will naturally produce scaling relation. point co-evolution especially lower masses, putative break, mainly driven rather AGN feedback.