Measuring Redshift-Space Distortions using Photometric Surveys

Understand

We outline how redshift-space distortions (RSD) can be measured from the angular correlation function w({\theta}), of galaxies selected from photometric surveys.

• The natural degeneracy between RSD and galaxy bias can be minimized by comparing results from bins with top-hat galaxy selection in redshift, and bins based on the radial position of galaxy pair centres.
• This comparison can also be used to test the accuracy of the photometric redshifts.
• The presence of RSD will be clearly detectable with the next generation of photometric redshift surveys.