21cm probes on axion dark matter from enhanced small-scale structure

by kenji kadota


The prospects of future radio telescopes, such as the SKA, to probe the axion dark matter will be discussed. 

The particular attention will be given to the scenarios where the spontaneous breaking of the Peccei-Quinn (PQ) symmetry occurs after the inflation, so that the matter power spectrum is enhanced at the small scale leading to the abundant early formed minihalos.