Forecasting cosmological constraints from 21 cm Intensity Mapping with DSA-2000

The DSA 2000 is an ultra-wideband radio telescope operating over 0.7 - 2 GHz with 2000 dishes of 5m in diameter. This will enable us to probe the 21-cm radiation from neutral hydrogen between redshifts of 0<z<1.02 thereby tracing the matter distribution and large-scale structure of the Universe from low to intermediate redshifts. In this work, we present and quantify the cosmological constraining power of the DSA-2000. Using simulations and expected 21-cm power spectrum sensitivity, we present a forecast of cosmological constraints, including observables such as -the expansion rate, growth rate, and angular diameter distance and parameters such as - the densities of dark energy and dark matter, spatial curvature, the dark energy equation of state can be measured by the DSA-2000 experiment. This will be done by taking into account the experimental configuration and potential systematics. This work will be based on the analysis presented in Bull et al. 2015 and will use the RadioFisher code presented in that work. We compare the cosmological constraining power of DSA-2000 with the other ongoing and planned Hydrogen intensity mapping experiments.