An antihalo void catalogue of the Local Super-Volume

Abstract

ABSTRACT We construct an antihalo void catalogue of 150 voids with radii $R \gt 10\, h^{-1}\mathrm{\, Mpc}$ in the Local Super-Volume ($\lt 135\, h^{-1}\mathrm{\, Mpc}$ from the Milky Way), using posterior resimulation of initial conditions inferred by field-level inference with Bayesian Origin Reconstruction from Galaxies (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 Λ cold dark matter expectations once environmental selection (e.g. the estimated $\sim 4{{\ \rm per\ cent}}$ underdensity of the Local Super-Volume) is accounted for.