Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical evolution of electromagnetic perturbation in the background of
  a scalar hairy black hole in Horndeski theory   We have investigated dynamical evolution of electromagnetic perturbation in a
scalar hairy black hole spacetime, which belongs to solutions in Horndeski
theory with a logarithmic cubic term. Our results show that the parameter
$\alpha$ affects the existence of event horizon and modifies the asymptotical
structure of spacetime at spatial infinity, which imprints on the quasinormal
frequency of electromagnetic perturbation. Moreover, we find that the late-time
tail of electromagnetic perturbation in this background depends also on the
parameter $\alpha$ due to the existence of solid angle deficit. The presence of
the parameter $\alpha$ makes the perturbation field decay more rapidly. These
imply that the spacetime properties arising from the logarithmic cubic term in
the action play important roles in the dynamical evolutions of the
electromagnetic perturbation in the background of a scalar hairy black hole.

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The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
2
The categories of this paper are: math