Astro Lunch

Getting the most out of galaxy clustering in combined probes cosmology

Large scale galaxy surveys are used to measure cosmological parameters through measurements of galaxy weak lensing, and galaxy clustering. By combining these two probes in the latest galaxy surveys, degeneracies with nuisance parameters can be broken such that constraints on cosmic structure are competitive with the CMB. We can compare these measurements of low redshift structure with the CMB to test the validity of LCDM and other dark energy models. In this talk, I will give a brief overview of combined probe cosmology from galaxy surveys, focussing on the Dark Energy Survey Year 1 results. I will then discuss the current limitations of these studies, focussing on galaxy clustering systematics, and how to maximise the constraining power of future galaxy clustering surveys.