Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Active galaxies can make axionic dark energy   AGN jets carry helical magnetic fields, which can affect dark matter if the
latter is axionic. This preliminary study shows that, in the presence of strong
helical magnetic fields, the nature of the axionic condensate may change and
become dark energy. Such dark energy may affect galaxy formation and galactic
dynamics, so this possibility should not be ignored when considering axionic
dark matter.

16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics