Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible imprints of cosmic strings in the shadows of galactic black
  holes   We examine the shadow cast by a Kerr black hole pierced by a cosmic string.
The observable images depend not only on the black hole spin parameter and the
angle of inclination, but also on the deficit angle yielded by the cosmic
string. The dependence of the observable characteristics of the shadow on the
deficit angle is explored. The imprints in the black hole shadow left by the
presence of a cosmic string can serve as a method for observational detection
of such strings.

30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int