Description
Counts-in-Cells modelling in spectroscopic and HI intensity mapping surveys
The modelling of beyond two-point statistics is essential to interpret non-linear data from current and upcoming spectroscopic, photometric or Intensity Mapping surveys. We simulate Counts-in-Cells in spectroscopic and HI Intensity Mapping surveys. For the spectroscopic side, we show that Counts-in-Cells are essential to constrain the scatter of galaxies of Halo Occupation Distribution models, using galaxy catalogues adapted to eBOSS Emission-Line Galaxies. For the HI Intensity Mapping side, we generate SKA1-like Intensity Maps affected by observational systematics such as foreground removal and the telescope beam. We explore how Counts-in-Cells are affected by those systematics and we provide a theoretical model for the Counts-in-Cells.
