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Answers from the Void: VIDE and its Applications

Published online by Cambridge University Press:  12 October 2016

P. M. Sutter ,
N. Hamaus ,
A. Pisani ,
G. Lavaux  and
B. D. Wandelt
P. M. Sutter
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France Center for Cosmology and AstroParticle Physics, Ohio State University, Columbus, USA
N. Hamaus
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France
A. Pisani
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France
G. Lavaux
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France
B. D. Wandelt
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France Department of Physics, University of Illinois at Urbana-Champaign, Urbana, USA Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, USA
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Abstract

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We discuss various applications ofvide, the Void IDentification and Examination toolkit, anopen-source Python/C++ code for finding cosmic voids in galaxy redshift surveysand $N$-body simulations.Based on a substantially enhanced version of ZOBOV, vide not only finds voids, but alsosummarizes their properties, extracts statisticalinformation, and providesa Python-based platform for more detailed analysis, such asmanipulating void catalogs and particle members, filtering, plotting,computing clustering statistics, stacking, comparing catalogs, andfitting density profiles.vide also provides significant additional functionality forpre-processing inputs: for example, vide can work with volume- ormagnitude-limited galaxy samples with arbitrary survey geometries,or darkmatter particles or halo catalogs in a variety of common formats.It can also randomly subsample inputsand includes a Halo Occupation Distribution model forconstructing mock galaxy populations.vide has been used for a wide variety of applications, fromdiscovering a universal density profile to estimatingprimordial magnetic fields, andis publicly available athttp://bitbucket.org/cosmicvoids/vide\_publicandhttp://www.cosmicvoids.net.

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