Speaker
Description
The fundamental nature of dark matter so far eludes direct detection experiments, but it has left its imprint in the cosmic large-scale structure. Extracting this information requires accurate modelling of structure formation for different dark matter theories (e.g., the axion), careful handling of astrophysical uncertainties and consistent observations in independent cosmological probes. I will present a novel dark matter science programme using galaxy weak lensing to probe a region of axion dark matter parameter space that cannot be probed by other cosmic tracers. I will present forecasts for the sensitivity of Rubin LSST year 1 cosmic shear to axion dark matter, for the first time accounting for non-linear axion structure formation and its interplay with astrophysical feedback, demonstrating how to disentangle between axion and feedback effects to the S_8 cosmological parameter discrepancy.
