Experimental Constraints on the Axion Dark Matter Halo Density
/ Authors
S. Asztalos, E. Daw, H. Peng, L. Rosenberg, D. Yu, C. Hagmann, D. Kinion, W. Stoeffl, K. Bibber, J. Laveigne
and 5 more authors
/ Abstract
Most of the mass of the Milky Way is contributed by its halo, presumably in the form of noninteracting cold dark matter. The axion is a compelling cold dark matter candidate. We report results from a search that probes the local Galactic halo axion density using the Sikivie radio frequency cavity technique. Candidates over the frequency range 550 MHz ≤ f ≤ 810 MHz (2.3 μeV ≤ ma ≤ 3.4 μeV) were investigated. The absence of a signal suggests that the axions of Kim and Shifman, Vainshtein, & Zakharov contribute no more than 0.45 GeV cm-3 of mass density to the local dark matter halo over this mass range.
Journal: The Astrophysical Journal Letters
DOI: 10.1086/341130