Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superradiant instability of charged massive scalar field in
  Kerr-Newman-anti-de Sitter black hole   We study the superradiance instability of charged massive scalar field in the
background of Kerr-Newman-anti-de Sitter black hole. By employing the
asymptotic matching technique to solve Klein-Gordon equation analytically, the
complex parts of quasinormal frequencies are shown to be positive in the regime
of superradiance. Because the calculation is performed in the approximation of
small black hole, the result indicates that small Kerr-Newman-anti-de Sitter
black hole is unstable against the massive scalar field perturbation with small
charge.

22
The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess