Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: What is the final state of a black hole merger?   In this short paper we discuss the possibility of testing the nature of
astrophysical black holes using the recently observed black hole mergers. We
investigate the possibility that a secondary black hole is created in the
merger of two astrophysical black holes and discuss potential astrophysical
signatures. We point out that black hole mergers are a possible astrophysical
mechanism for the creation of quantum black holes with masses close to the
Planck mass.

34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs