Enea Di Dio
CERN

Abstract
Upcoming LSS surveys will probe almost the whole observable universe at low redshift. To correctly interpret measurements of modes at the horizon scale we need to develop an accurate relativistic gauge-invariant description of LSS, beyond the simple Newtonian approximation.
Some relativistic effects break the symmetry along the line-of-sight and they source, contrarily to the standard perturbation theory, the odd multipoles of the matter power spectrum, providing a unique signature for their detection in LSS surveys.
In my talk I will present a novel approach to compute the relativistic effects at the leading order in the weak field approximation and I will discuss how this approach can simplify the comparison with (light-cone) N-body simulations.
I will conclude showing that a conservative Fisher matrix forecast suggests that DESI will be able to detect (at least at 4sigma) the impact of relativistic effects on the dipole power spectrum.

2020 November 09, 15:30

IA
Online broadcast (Zoom)