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arXiv · 2311.12926

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

Stephen Stopyra·Hiranya V. Peiris·Andrew Pontzen·Jens Jasche·Guilhem Lavaux
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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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Stephen Stopyra, Hiranya V. Peiris, Andrew Pontzen, Jens Jasche, Guilhem Lavaux. 2023-11-21. An Anti-halo Void Catalogue of the Local Super-Volume. https://doi.org/10.1093/mnras%2Fstae1251

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