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Abstract: We present a framework for the hierarchical identification andcharacterization of voids based on the Watershed Void Finder. The HierarchicalVoid Finder is based on a generalization of the scale space of a density fieldinvoked in order to trace the hierarchical nature and structure of cosmologicalvoids. At each level of the hierarchy, the watershed transform is used toidentify the voids at that particular scale. By identifying the overlappingregions between watershed basins in adjacent levels, the hierarchical void treeis constructed. Applications on a hierarchical Voronoi model and on a set ofcosmological simulations illustrate its potential.



Author: M.A. Aragon-Calvo, R. van de Weygaert, P. Araya-Melo, E. Platen, A.S. Szalay

Source: https://arxiv.org/







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