Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interpreting the possible break in the Black Hole - Bulge mass relation   Recent inspections of local available data suggest that the almost linear
relation between the stellar mass of spheroids ($M_{\rm sph}$) and the mass of
the super massive Black Holes (BHs) residing at their centres, shows a break
below $M_{\rm sph} \sim 10^{10}\ {\rm M}_\odot$, with a steeper, about
quadratic relation at smaller masses. We investigate the physical mechanisms
responsible for the change in slope of this relation, by comparing data with
the results of the semi-analytic model of galaxy formation MORGANA, which
already predicted such a break in its original formulation. We find that the
change of slope is mostly induced by effective stellar feedback in star-forming
bulges. The shape of the relation is instead quite insensitive to other
physical mechanisms connected to BH accretion such as disc instabilities,
galaxy mergers, Active Galactic Nucleus (AGN) feedback, or even the exact
modelling of accretion onto the BH, direct or through a reservoir of low
angular momentum gas. Our results support a scenario where most stars form in
the disc component of galaxies and are carried to bulges through mergers and
disc instabilities, while accretion onto BHs is connected to star formation in
the spheroidal component. Therefore, a model of stellar feedback that produces
stronger outflows in star-forming bulges than in discs will naturally produce a
break in the scaling relation. Our results point to a form of co-evolution
especially at lower masses, below the putative break, mainly driven by stellar
feedback rather than AGN feedback.

12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex