Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Acoustic regular black hole in fluid and its similarity and diversity to
  a conformally related black hole   We address an interesting question in the present paper that whether the
acoustic gravity can be applied as a tool to the study of regular black holes.
For this purpose, we construct a general acoustic regular black hole in the
spherically symmetric fluid, where its regularity is verified from the
perspective of finiteness of curvature invariants and completeness of
geodesics. In particular, we find that the acoustic interval not only looks
like a line element of a conformally related black hole in which the fluid
density can be regarded as a conformal factor, but also gives rise to a
non-vanishing partition function which coincides with that of a conformally
related black hole. As an application, we provide a specific acoustic regular
black hole model, investigate its energy conditions and compute its quasinormal
modes. We note that the strong energy condition of our model is violated
completely outside the horizon of the model but remains valid in some regions
inside the horizon, which may give a new insight into the relation between the
regularity and strong energy condition. Moreover, we analyze the oscillating
and damping features of our model when it is perturbed.

35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph