Speaker
Description
In recent years, cosmic voids have emerged as a promising new tool in cosmology, offering valuable insights complementary to galaxy 2-point statistics. However, to effectively utilize voids as cosmological probes to analyze the huge amount of data expected from upcoming surveys, robust statistical modeling is imperative. In this presentation, we introduce a novel combination of the excursion-set approach with peak theory formalism, providing accurate predictions for both halo and void statistics across a broad spectrum of scales. Specifically, we show that our theoretical framework yields halo mass functions and void size functions that closely match measurements obtained from simulations. Furthermore, we derive Lagrangian void density profiles that accurately match observations from cosmological simulations. Finally, we explore the potential of voids in precision cosmology within the context of upcoming galaxy surveys, such as Euclid and Roman, discussing their complementarity in probing dark energy density, equation of state, and massive neutrinos alongside other cosmological probes.
