Iterative reconstruction excursions for Baryon Acoustic Oscillations and beyond

Understand

The density field reconstruction technique has been widely used for recovering the Baryon Acoustic Oscillation (BAO) feature in galaxy surveys that has been degraded due to nonlinearities.

• Recent studies advocated adopting iterative steps to improve the recovery much beyond that of the standard technique.
• In this paper, we investigate the performance of a few selected iterative reconstruction techniques focusing on the BAO and the broadband-shape of the two-point clustering.
• We include redshift-space distortions, halo bias, and shot noise and inspect the components of the reconstructed field in Fourier space and in configuration space using both density field-based reconstruction and displacement field-based reconstruction.