Optimal Weights For Measuring Redshift Space Distortions in Multi-tracer Galaxy Catalogues

Understand

Since the volume accessible to galaxy surveys is fundamentally limited, it is extremely important to analyse available data in the most optimal fashion.

• One way of enhancing the cosmological information extracted from the clustering of galaxies is by weighting the galaxy field.
• The most widely used weighting schemes assign weights to galaxies based on the average local density in the region (FKP weights) and their bias with respect to the dark matter field (PVP weights).
• They are designed to minimize the fractional variance of the galaxy power-spectrum.