Probing the existence of hypothetical particles beyond the Standard model often deals with
extreme parameters: large energies, tiny cross-sections, large time scales, etc. Sometimes …

The axion, motivated as a solution to the strong CP problem, is also a viable dark matter
candidate. The axion field takes random values in causally disconnected regions if the …

Recent work has shown that axions can be efficiently produced via nonstationary pair
plasma discharges in the polar cap region of pulsars. Here, we point out that for axion …

The QCD axion is expected to form dense structures known as axion miniclusters if the
Peccei-Quinn symmetry is broken after inflation. Miniclusters that have survived until today …

Axion dark matter can resonantly convert to photons in the magnetosphere of neutron stars,
possibly giving rise to radio signals observable on Earth. This method for the indirect …

A bstract Axions are well-motivated candidates for dark matter. Recently, much interest has
focused on the detection of photons produced by the resonant conversion of axion dark …

One of the promising new proposals to search for axions in astrophysical environments is to
look for narrow radio lines produced from the resonant conversion of axion dark matter …

Ray tracing plays a vital role in black hole imaging, modeling the emission mechanisms of
pulsars, and deriving signatures from physics beyond the Standard Model. In this work we …

Nonrelativistic axions can be efficiently produced in the polar caps of pulsars, resulting in the
formation of a dense cloud of gravitationally bound axions. Here, we investigate the interplay …

Many present-day axion searches attempt to probe the mixing of axions and photons, which
occurs in the presence of an external magnetic field. While this process is well understood in …