Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational waves from collapsing globular cluster systems   The evolution of globular cluster systems in some galaxies can be cause of
merging of globulars in the very central regions.
  This high stellar density favours the growth of a central nucleus via
swallowing of surrounding stars. The infall of stars into a nuclear black hole
is here shown to be, under certain conditions, not only source of
electromagnetic radiation but also a significant source of gravitational waves.

34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex