Resonant Conversion of Dark Matter Oscillons in Pulsar Magnetospheres
  Due to their high magnetic fields and plasma densities, pulsars provide
excellent laboratories for tests of beyond Standard Model (BSM) physics. When
axions or axion-like particles (ALPs) approach closely enough to pulsars, they
can be resonantly converted to photons, yielding dramatic electromagnetic
signals. We discuss the possibility of detecting such signals from bound
configurations of axions, colliding with pulsar magnetospheres. We find that
all but the densest axion stars, $\textit{oscillons}$, are tidally destroyed
well before resonant conversion can take place. Oscillons can be efficiently
converted to photons, leading to bright, ephemeral radio flashes. Observation
of the galactic bulge using existing (Very Large Array and LOFAR) and
forthcoming (Square Kilometer Array) radio missions has the potential to detect
such events for axion masses in the range $m_a \in \left[0.1 \ \mu\text{eV},
200 \ \mu\text{eV}\right]$, even if oscillons make up a negligible fraction of
dark matter.
