Title: Looking in the axion mirror: An all-sky analysis of axion stimulated decay
Abstract: Axion dark matter produces echo images of bright radio sources via stimulated decay. These images appear as a faint radio line centered at half the axion mass, with the line width set by the dark matter velocity dispersion. Due to the kinematics of the decay, the echo can be emitted in the direction nearly opposite to the incoming source of stimulating radiation, meaning that axions effectively behave as imperfect monochromatic mirrors. In this talk, I will present two ways of looking for axion echoes using radio telescopes: focusing on the antipodal points of single supernova remnants, or scanning the whole sky for aggregated signal due to supernova remnants, galactic synchrotron radiation, and extragalactic point sources. In both cases, we find that existing telescopes such as FAST and CHIME can set competitive limits in the axion-photon coupling constant.
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