Statistical and systematic errors in redshift-space distortion measurements from large surveys

Understand

We investigate the impact of statistical and systematic errors on measurements of linear redshift-space distortions (RSD) in future cosmological surveys, analyzing large catalogues of dark-matter halos from the BASICC simulation.

• These allow us to estimate the dependence of errors on typical survey properties, as volume, galaxy density and mass (i.e.
• bias factor) of the adopted tracer.
• We find that measures of the specific growth rate \beta=f/b using the Hamilton/Kaiser harmonic expansion of the redshift-space correlation function \xi(r_p,\pi) on scales larger than 3/h Mpc are typically under-estimated by up to 10% for galaxy sized halos.