Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: May axion clusters be sources of fast radio bursts?   Fast radio bursts can be caused by some phenomena related to 'new
physics'.One of the most prominent candidates of the kind are axion Bose stars
which can engender bursts when undergoing conversion into photons in
magnetospheres of neutron stars or during their collapse. In this short
research note an importance of three observational criteria is outlined, namely
total energetic, $\mathcal{O}$(ms) duration and non-monochromatic shape of the
spectrum. It is shown that it is impossible to meet these criteria in
simplified models of axion-neutron star interaction scenario and thorough
investigation of more complex models which involve back-reaction and non-linear
effects are needed in order to explain FRBs within this scenario.

3
The categories of this paper are: physics
19
The categories of this paper are: eess
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio