On the Abundance of Extreme Voids

Understand

Cosmic voids have been shown to be an effective probe of cosmology, complementary to galaxy clusters.

• In this work, we present a simple theoretical framework for predicting of the size of the largest voids expected within a given redshift and volume.
• Our model is based on the exact extreme-value statistics which has previously been successfully applied to massive galaxy clusters.
• We implement our formalism using the void-abundance models and compare the extreme-void predictions to simulations and observations.