Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the effect of scalar fields on Hawking radiation and quasinormal
  modes of black holes   The present thesis attempts to study the effect of scalar fields on Hawking
radiation and quasinormal modes of black holes. We selected a static,
spherically symmetric electrically charged black hole with an additional scalar
'hair' for our analysis. The scalar 'hair' is sourced by a scalar field,
conformally coupled to the Einstein-Hilbert action. The scalar field can
survive even in the absence of the black hole's electric charge and is
characterized as a 'primary hair'. This scalar field changes the gravitational
constant, and hence modifies the ADM (Arnowitt-Deser-Missner) mass of the black
hole. The scalar field's strength is determined by a scalar 'charge' that
manifests itself as an additive correction to the square of the electric charge
in the standard Reissner-Nordstr\"{o}m metric. This seemingly simple
modification leads to nontrivial physical implications.

36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn