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An Anti-halo Void Catalogue of the Local Super-Volume

Published 21 Nov 2023 in astro-ph.CO and astro-ph.GA | (2311.12926v2)

Abstract: We construct an anti-halo void catalogue of $150$ voids with radii $R > 10\,h{-1}\mathrm{\,Mpc}$ in the Local Super-Volume ($<135\,h{-1}\mathrm{\,Mpc}$ from the Milky Way), using posterior resimulation of initial conditions inferred by field-level inference with Bayesian Origin Reconstruction from Galaxies (\codefont{BORG}). We describe and make use of a new algorithm for creating a single, unified void catalogue by combining different samples from the posterior. The catalogue is complete out to $135\,h{-1}\mathrm{\,Mpc}$, with void abundances matching theoretical predictions. Finally, we compute stacked density profiles of those voids which are reliably identified across posterior samples, and show that these are compatible with $\Lambda$CDM expectations once environmental selection (e.g., the estimated $\sim 4\%$ under-density of the Local Super-Volume) is accounted for.

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