Redshift-space distortions with split densities

Understand

Accurate modelling of redshift-space distortions (RSD) is challenging in the non-linear regime for two-point statistics e.g.

• the two-point correlation function (2PCF).
• We take a different perspective to split the galaxy density field according to the local density, and cross-correlate those densities with the entire galaxy field.
• Using mock galaxies, we demonstrate that combining a series of cross-correlation functions (CCFs) offers improvements over the 2PCF as follows: 1.