zobov: a parameter-free void-finding algorithm

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 e...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society Vol. 386; no. 4; pp. 2101 - 2109
Main Author: Neyrinck, Mark C.
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01.06.2008
Blackwell Science
Oxford University Press
Subjects:
Algorithms
Astronomy
Astrophysics
cosmology: theory
Dark matter
Earth, ocean, space
Exact sciences and technology
large-scale structure of Universe
methods: data analysis
Poisson distribution
Simulation
methods: data analysis
large-scale structure of Universe
cosmology: theory
Data analysis
Fluctuations
High density
Voronoi tessellation
Probability
Probability distribution
Large-scale structure
Algorithms
Dark matter
Cosmology
ISSN:0035-8711, 1365-2966
Online Access:Get full text
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Summary: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.
Bibliography:ark:/67375/HXZ-J089GFZ0-Z
istex:A24B06D069447E139E95A7E64E1B816D04596D3D
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ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2008.13180.x