부산대학교 도서관

We discuss how astrophysical observations with the Maunakea SpectroscopicExplorer (MSE), a high-multiplexity (about 4300 fibers), wide field-of-view(1.5 square degree), large telescope aperture (11.25 m) facility, can probe theparticle nature of dark matter. MSE will conduct a suite of surveys that willprovide critical input for determinations of the mass function, phase-spacedistribution, and internal density profiles of dark matter halos across allmass scales. N-body and hydrodynamical simulations of cold, warm, fuzzy andself-interacting dark matter suggest that non-trivial dynamics in the darksector could have left an imprint on structure formation. Analysed within theseframeworks, the extensive and unprecedented datasets produced by MSE will beused to search for deviations away from cold and collisionless dark mattermodel. MSE will provide an improved estimate of the local density of darkmatter, critical for direct detection experiments, and will improve estimatesof the J-factor for indirect searches through self-annihilation or decay intoStandard Model particles. MSE will determine the impact of low masssubstructures on the dynamics of Milky Way stellar streams in velocity space,and will allow for estimates of the density profiles of the dark matter halosof Milky Way dwarf galaxies using more than an order of magnitude more tracers.In the low redshift Universe, MSE will provide critical redshifts to pin downthe luminosity functions of vast numbers of satellite systems, and MSE will bean essential component of future strong lensing measurements to constrain thehalo mass function. Across nearly all mass scales, the improvements offered byMSE, in comparison to other facilities, are such that the relevant analyses arelimited by systematics rather than statistics.