Beschreibung
Upcoming and ongoing large-scale structure surveys are probing the Universe across increasingly large volumes, opening a new window onto relativistic effects that become important on horizon scales. In this talk, I will discuss how these effects enter observed galaxy clustering statistics in redshift space. While the standard Kaiser contribution captures the dominant Newtonian redshift-space distortion, additional Doppler and relativistic projection terms introduce characteristic odd-parity signatures. These contributions are particularly important in higher-order statistics, where they can provide new information about primordial non-Gaussianity, improve constraints on cosmological parameters, and could potentially offer tests of fundamental physics such as parity. I will present the structure of the relativistic corrections at second and third order and their impact on the bispectrum and trispectrum.