Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Astrophysical Haloscopes   We compute the fluxes of radio photons from conversion of axion-like particle
dark matter in cosmic magnetic fields. We find that for axion-like particle
masses around $10^{-6}\,$eV and effective coupling constants to photons
$g_{a\gamma}\gtrsim10^{-13}\,{\rm GeV}^{-1}$ strongly magnetized nearby stellar
winds may give detectable line-like radio photon signals, although predicted
fluxes are highly uncertain due to the poorly known structure of the magnetic
fields. Nevertheless, it may be worth while to conduct a dedicated search in
the direction of such sources. When combined with a possible future laboratory
detection of axion-like dark matter such observations may in turn provide
information on the small scale magnetic field structure in such objects.

33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat