Developing a unified pipeline for large-scale structure data analysis with angular power spectra -- I. The importance of redshift-space distortions for galaxy number counts

Understand

We develop a cosmological parameter estimation code for (tomographic) angular power spectra analyses of galaxy number counts, for which we include, for the first time, redshift-space distortions (RSD) in the Limber approximation.

• This allows for a speed-up in computation time, and we emphasise that only angular scales where the Limber approximation is valid are included in our analysis.
• Our main result shows that a correct modelling of RSD is crucial not to bias cosmological parameter estimation.
• This happens not only for spectroscopy-detected galaxies, but even in the case of galaxy surveys with photometric redshift estimates.