  In this article we treat the non-adiabatic photon-to-axion resonant
conversion of curvature radiation, synchrotron emission and inverse Compton
scattering dominating the spectral density function of pulsars. First, we
introduce emission models and benchmark observational data.vWe adopt a
state-of-the-art density profile that relieves tension with the quantum
electrodynamics vacuum polarization effect in highly magnetic stars, leading to
efficient mixing. Then, we estimate the dark matter flux induced by
photon-axion oscillation across the light cylinder of the neutron star. We find
that pulsars might produce axion overdensities many orders of magnitude over
the occupation number of dark matter in the Galactic halo within a broad
parameter space. We point out possible new methods for axion detection derived
from these results and other future lines of work.
