Orateur
Description
We present a physically motivated model for the power spectrum of galaxies weighted by their star formation rates, decomposing it into a 1-halo and 2-halo term while incorporating key effects such as nonlinear bias, scale-dependent shot noise and halo exclusion. Our model reproduces the LIM TNG power spectrum to within a few percent across all scales. We find that omitting satellite galaxies leads to an underestimation of both the large-scale bias and the mean intensity by approximately 30% at z∼1.5.
Additionally, we investigate the impact of secondary bias, revealing systematic errors of ∼5% in the 2-halo term and ∼10% in the 1-halo term. These results highlight the importance of accurately modelling galaxy-halo connections and halo-scale effects to extract optimal information from LIM surveys.
