Speaker
Jan-Albert Viljoen
(University of the Western Cape)
Description
The large-scale structure growth index γ provides a consistency test of the standard cosmology and is a potential indicator of modified gravity. We investigate the constraints on γ from next-generation spectroscopic surveys (like SKA, Euclid and DESI), and possible improvements from combining these using a multi-tracer technique. Using the angular power spectrum, which is observed in redshift space, we avoid the need for an Alcock-Packzynski correction. It also naturally incorporates cosmic evolution and wide angle effects, without any approximation. We include the cross-correlations between redshift bins, using a hybrid approximation
when the total number of bins is computationally unfeasible.
Authors
Jan-Albert Viljoen
(University of the Western Cape)
Dr
Jose' Fonseca
(University of Padua)
Prof.
Roy Maartens
(University of the Western Cape)
