Multi-probe LSST cosmology forecasts with Dark Energy Science Collaboration likelihood tools

The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) will constrain our models of the universe through observations of galaxies and galaxy clusters as well as transients such as supernovae and strongly lensed quasars. We analyze simulated LSST data using the Dark Energy Science Collaboration cosmology pipeline to obtain multi-probe forecasts for cosmological parameters after one and ten years of observations. We then explore how various systematic sources of uncertainty affect our predicted cosmological constraints.