A search for non-virialized axionic dark matter

Understand

Cold dark matter in the Milky Way halo may have structure defined by flows with low velocity dispersion.

• The Axion Dark Matter eXperiment high resolution channel is especially sensitive to axions in such low velocity dispersion flows.
• Results from a combined power spectra analysis of the high resolution channel axion search are presented along with a discussion of the assumptions underlying such an analysis.
• We exclude KSVZ axion dark matter densities of {\rho} > 0.2 GeV/cm^3 and DFSZ densities of {\rho} > 1.4 GeV/cm^3 over a mass range of m_a = 3.3{\mu}eV to 3.69{\mu}eV for models having velocity dispersions of {\Delta}{\beta} < 3x10^-6.