Cosmic voids

I started working on cosmic voids in 2008 in collaboration with Ben Wandelt at University of Illinois. We started this endeavour with a first idea of defining cosmic voids according to the local dynamic of expansion of matter. This has yielded the DIVA framework (arXiV:090.4101). This has proved to give extremely precise prediction and robust physical interpretation. Unfortunately that also meant that we had to know many things cosmology before ... measuring cosmological information, which was the opposite we wanted to do.

So we started working on something less proper but more akin to yield direct cosmological information. Definining cosmic voids according to topology. We were not the first and we have used the ZOBOV (thanks Mark Neyrinck!) toolbox. The original idea was to run an Alcock-Pasczynski test on voids. As the Universe is supposed to isotropic, it is still possible to extract cosmological information from the relative aspect of a stack of similar voids as seen at redshift /z/.

After some years, and a few publications, and with the help of Paul M. Sutter, we ended up building the VIDE pipeline (arXiv:1406.1191). This toolbox is now public and used by several groups around the world.

It can be obtained from the bitbucket repository. Please also go the official cosmic voids website where all fresh information are available.

(C) Guilhem Lavaux, 2014 - 2017,
Last updated: November 21, 2014