Cosmological Constraints from the Void Size Function
Sofia Contarini
Observing the Universe at very large scales, a significant fraction of its volume is dominated by nearly empty space. Alongside the luminous filamentary structures, there are vast underdense regions known as cosmic voids. Despite being almost devoid of matter, voids contain crucial information about the cosmological framework. In this talk, I will present the first cosmological constraints derived from analyzing the void size function, which is the number of cosmic voids as a function of their radius. These results are obtained from modeling voids identified in the final BOSS DR12 data set, using a state-of-the-art methodology that accounts for various observational effects. I will showcase the constraining power achieved on the main parameters of the ΛCDM and wCDM models. This methodology also allows us to make forecasts for future redshift surveys. Specifically, I will present the official cosmological forecasts from the void size function for the ongoing Euclid mission.
Event Timeslots (1)
Mon
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