Speaker
Description
As our maps of Large Scale Structure increase in scale and precision and larger volumes are probed, it is crucial to properly model the observable quantities to construct robust predictions and maximize the information extracted by these new surveys. We present a full methodology for analyzing galaxy clustering on the lightcone with the 2-point correlation in the Spherical Fourier-Bessel (SFB) formalism. SFB is a natural choice to account for all wide-angle and relativistic (GR) effects, allowing to efficiently extract information from large volume galaxy surveys. We extend previous studies using SFB by including all projection and GR effects, and we develop an efficient numerical implementation that does not rely on commonly (mis)used approximations and includes a full non-diagonal covariance. We investigate the impact of neglecting GR corrections in cosmological parameter constraints, focusing on Primordial Non-Gaussianity and bias parameters. We also present a novel prescription for multi-bin correlations that allow to significantly boost the detectability of GR effects, opening a new window on general relativity testing.
