Imprints of local lightcone projection effects on the galaxy bispectrum. III Relativistic corrections from nonlinear dynamical evolution on large-scales

TL;DR

This paper investigates how relativistic nonlinear dynamical evolution influences the galaxy bispectrum through lightcone projection effects, revealing significant contributions on large scales.

Contribution

It extends previous work by incorporating relativistic nonlinear dynamical effects into the galaxy bispectrum analysis, improving the accuracy of large-scale cosmological observations.

Findings

Relativistic dynamical effects significantly impact the galaxy bispectrum.

Nonlinear evolution alters lightcone projection effects on large scales.

The updated model improves understanding of relativistic corrections in galaxy surveys.

Abstract

The galaxy bispectrum is affected on equality scales and above by relativistic observational effects, at linear and nonlinear order. These lightcone effects include local contributions from Doppler and gravitational potential terms, as well as integrated contributions like lensing, together with all the couplings at nonlinear order. We recently presented the correction to the galaxy bispectrum from all local lightcone effects up to second order in perturbations, using a plane-parallel approximation. Here we update our previous result by including the effects from relativistic nonlinear dynamical evolution. We show that these dynamical effects make a significant contribution to the projection effects.