Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasinormal mode oscillations in an analogue black hole experiment   The late stages of the relaxation process of a black hole are expected to
depend only on its mass and angular momentum and not on the details of its
formation process. Inspired by recent analogue gravity experiments, which
demonstrate that certain black hole processes take place in gravitational and
hydrodynamical systems alike, we conduct an experiment to search for
quasinormal mode oscillations of the free surface of a hydrodynamical vortex
flow. Our results demonstrate the occurrence and hint at the ubiquity of
quasinormal ringing in nonequilibrium analog black hole experiments.

25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph