Speaker
Dr
Chen Sun
(Los Alamos National Laboratory)
Description
In this talk I will first discuss how rotation-dominated galaxies can be used to constrain the size of solitons inside galaxy dark matter halos. I will discuss how this confronts the theoretical expectation, which leads to a robust constraint on the fraction of ultralight dark matter in a wide mass range from 10^{-24} eV to 10^{-20} eV. I will then discuss how this bound is affected by the Peccei-Quinn scale and its sensitivity to the type of axion potential. The talk will be based on the work 2111.03070 as well as work in preparation.
Author
Dr
Chen Sun
(Los Alamos National Laboratory)
