Speaker
Description
Measuring primordial non-Gaussianity (PNG) is one of the goals of current and future galaxy surveys. Since general relativistic effects are degenerate with any signal measured from PNG, a fully relativistic, non-Newtonian approach is required. In previous studies, integrated line-of-sight effects, such as lensing convergence, Shapiro time delay and integrated Sachs-Wolfe, have largely been ignored in power spectrum analysis.
In this talk, I will show that it is important to consider integrated effects to model the power spectrum accurately. In current galaxy surveys, such as Euclid, we show that by neglecting these contributions in our power spectrum analyses, we bias our PNG measurements on the order of 3$\sigma$. This effect becomes increasingly important at higher redshift and for future galaxy surveys like MegaMapper, making it crucial to include integrated effects in current and future power spectrum analyses.