Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Galactic Mergers with Supermassive Black Holes   We present the results of N-body simulations of the accretion of high-density
dwarf galaxies by low-density giant galaxies. Both galaxies contain power-law
central density cusps and point masses representing supermassive black holes;
the ratio of galaxy masses is 3:1. The cusp of the dwarf galaxy is always
disrupted during the merger, leading to a remnant with a weak power law in the
intrinsic density and a ``core'' in the projected density. Removing both black
holes from the giant and dwarf galaxies allows the dwarf galaxy to remain
intact and leads to a remnant with a high central density, contrary to what is
observed. Our results support the hypothesis than the persistence of
low-density cores in giant galaxies following mergers is a consequence of the
existence of supermassive central black holes.

15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
16
The categories of this paper are: stat
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The categories of this paper are: q-fin
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol