Submitted by Mathieu PUECH
M. Puech, et al.
GEPI
One of the prominent science goal of future ELTs will be to study the physics and mass assembly of galaxies out to very high redshifts. I will first present the galaxy evolution science case for EAGLE, which is a NIR multi-integral field spectrograph dedicated to the E-ELT and under phase A study. I will then summarize results of simulations conducted to derive high level requirements for the instrument. In particular, I will detail how we have derived specifications for the ensquared energy that the AO system needs to provide to reach the scientific goals of the instrument.