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arXiv · 1502.07705

On the Abundance of Extreme Voids

Sirichai Chongchitnan
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Abstract

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. We find that the simplest void models can only explain the extreme-void abundance with ad hoc parameter adjustments. We argue that extreme-void distributions should be used as an additional test on theories of void abundance.

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Sirichai Chongchitnan. 2015-04-30. On the Abundance of Extreme Voids. https://doi.org/10.1088/1475-7516%2F2015%2F05%2F062

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