Journal Article

<span class="smallCaps">zobov</span>: a parameter-free void-finding algorithm

Mark C. Neyrinck

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 386, issue 4, pages 2101-2109
Published in print June 2008 | ISSN: 0035-8711
Published online April 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13180.x
zobov: a parameter-free void-finding algorithm

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zobov (ZOnes Bordering On Voidness) is an algorithm that finds density depressions in a set of points, without any free parameters, or assumptions about shape. It uses the Voronoi tessellation to estimate densities, which it uses to find both voids and subvoids. It also measures probabilities that each void or subvoid arises from Poisson fluctuations. This paper describes the zobov algorithm, and the results from its application to the dark matter particles in a region of the Millennium simulation. Additionally, the paper points out an interesting high-density peak in the probability distribution of dark matter particle densities.

Keywords: methods: data analysis; cosmology: theory; large-scale structure of Universe

Journal Article.  6895 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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