Making maps of cosmological parameters

Understand

We provide a fast algorithm to diagnose any directional dependence in the cosmological parameters by calculating maps of local cosmological parameter estimates and their joint errors.

• The technique implements a fast quadratic estimator technique based on Wiener filtering and convolution of the sky with a patch shape.
• It uses only three map-resolution spherical harmonic transforms per parameter and applies to any data set with full sky or a partial sky coverage.
• We apply this method to Planck SMICA-2015 and obtain fluctuation map for six cosmological parameters.