Description

Void catalogs: Gigantes includes 15,000 VIDE fiducial cosmology void catalogs, as well as over 9,000 catalogs in non-fiducial cosmologies, spanning various values of the following cosmological parameters \(\Omega_{\rm m}\), \(\Omega_{\rm b}\), \(h\), \(n_s\), \(\sigma_8\), \(M_\nu\), and fully leveraging the Quijote simulation suite, which covers redshifts z = 0.0, 0.5, 1.0, and 2.0 in real and redshift space.

Void finder: The void finding relies on the popular public void finder VIDE (Sutter et al. 2015b), arguably the most used void finder, as testified by its use in a plethora of papers performing both simulation-based theoretical modelling and data analysis from modern surveys (Papers using VIDE).

Information about VIDE, used to build Gigantes can be found here : VIDE Wiki .

Provided statistics: Void center position (x,y,z—this is the volume-weighted barycenter, a.k.a. macrocenter), Void effective radius (Mpc/h), Void ID, void volume, redshift, ellipticity, density contrast, number of children (sub-voids), central density …

The video below shows an example of a Gigantes void together with the positions of the galaxies used to identify it. Credit: Wang et al. 2022, see ArXiv and ApJ ; (for videos of more voids see : here).

Note: The Gigantes catalogs are created with the VIDE repository. In the VIDE repository, on the 2024-03-27, a minor bug has been fixed for the ellipticity file, where eigenvectors were printed in transposed order (see : here). Therefore for catalogs created before 2024-03-27 (this includes the Gigantes catalogs) the eigenvectors are printed in transposed order. This does not impact the computed ellipticities, so it would only affect analyses directly using the eigenvectors values.