Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Black holes in galactic centers: quasinormal ringing, grey-body factors
  and Unruh temperature   Recently, Cardoso et al. [arXiv:2109.00005] found an exact solution
describing the black hole immersed in a galactic-like distribution of matter.
There, the properties of gravitational radiation were studied. Here we continue
analysis of properties of this geometry via consideration of the
electromagnetic radiation. We calculate quasinormal modes, asymptotic tails and
grey-body factors for electromagnetic radiation. In addition, we discuss the
Unruh temperature for this spacetime. Estimations made in the regime which is
best fitting the galaxies behavior show that influence of the environment on
classical and quantum radiation around such black holes must be relatively
small.

20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an