Axion Cloud Decay due to the Axion-photon Conversion with Multi-pole Background Magnetic Fields

Yusuke Sakurai, Chul-Moon Yoo, Atsushi Naruko +1

We consider axion cloud decay due to the axion-photon conversion with multi-pole background magnetic fields. We focus on the $\ell =m=1$ and $n=2$ mode for the axion field configura…