Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regular black holes in de Sitter universe: scalar field perturbations
  and quasinormal modes   The purpose of this paper is to study quasinormal modes (QNM) of a regular
black hole with a cosmological constant due to scalar perturbations. A detailed
study of the QNM frequencies for the massless scalar field were done by varying
the parameters of the theory such as the mass, magnetic charge, cosmological
constant, and the spherical harmonic index. We have employed the sixth order
WKB approximation to compute the QNM frequencies. We have also proved
analytically that the $l=0$ mode for the massless field reach a constant value
at late times. We have approximated the near-extreme regular-de Sitter black
hole potential with the P$\ddot{o}$schl-Teller potential to obtain exact
frequencies. The null geodesics of the regular-de Sitter black hole is employed
to describe the QNM frequencies at the eikonal limit ($ l >>1$).

12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th