Speaker: Matthew Withers

Measuring the growth of structure is an important area of Cosmology as it contains so much information about Dark Energy and Gravity. Redshift Space Distortions (RSD) have been shown to be a powerful technique in performing such measurements but are limited by a degeneracy in galaxy bias and growth rate factor. Cai & Bernstein (2011) have shown that prior knowledge of galaxy bias can significantly improve RSD constraints on growth. It has been suggested that a weak gravitational lensing (WL) survey covering the same sky volume could provide this missing bias information, however current predictions disagree significantly. I will present my current progress in calculating the constraints on structure growth for a combined WL & RSD analysis using a Fisher matrix forecast.