Modelling redshift space distortions in hierarchical cosmologies

Understand

The anisotropy of clustering in redshift space provides a direct measure of the growth rate of large scale structure in the Universe.

• Future galaxy redshift surveys will make high precision measurements of these distortions, and will potentially allow us to distinguish between different scenarios for the accelerating expansion of the Universe.
• Accurate predictions are needed in order to distinguish between competing cosmological models.
• We study the distortions in the redshift space power spectrum in $\Lambda$CDM and quintessence dark energy models, using large volume N-body simulations, and test predictions for the form of the redshift space distortions.