The accuracy of parameters determined with the core-sampling method: application to Voronoi tessellations

Details The accuracy of parameters determined with the core-sampling method: application to Voronoi tessellations The accuracy of parameters determined with the core-sampling method: application to Voronoi tessellations

1996-10-06

arxiv.org/abs/astro-ph/9610041v1

Astronomy and Astrophysics

Astrophysics

14 pages (Latex) with 6 figures, the complete paper with 8 figures is available at http://kosmos.aip.de/~got/projects.html {Ch

Scientific paper

10.1051/aas:1997172

The large-scale matter distribution represents a complex network of structure elements such as voids, clusters, filaments, and sheets. This network is spanned by a point distribution. The global properties of the point process can be measured by different statistical methods, which, however, do not describe directly the structure elements. The morphology of structure elements is an important property of the point distribution. Here we apply the core-sampling method to various Voronoi tessellations. Using the core-sampling method we identify one- and two-dimensional structure elements (filaments and sheets) in these Voronoi tessellations and reconstruct their mean separation along random straight lines. We compare the results of the core-sampling method with the a priori known structure elements of the Voronoi tessellations under consideration and find good agreement between the expected and found structure parameters, even in the presence of substantial noise. We conclude that the core-sampling method is a potentially powerful tool to investigate the distribution of such structure elements like filaments and walls of galaxies.

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