Nexus of the Cosmic Web
Marius Cautun, Rien van de Weygaert, Bernard J.T. Jones, Carlos S., Frenk, Wojcieh A. Hellwing

TL;DR
This paper introduces the NEXUS+ formalism, an advanced multiscale method for identifying and characterizing the cosmic web's structures, enabling detailed analysis of environmental effects on dark matter haloes and galaxies.
Contribution
The work presents a novel multiscale, hierarchical algorithm that effectively traces all cosmic web components and characterizes their properties, improving upon previous methods.
Findings
Successful identification of cosmic web structures across scales
Ability to characterize filament and wall properties in detail
Facilitates analysis of environmental influence on haloes
Abstract
One of the important unknowns of current cosmology concerns the effects of the large scale distribution of matter on the formation and evolution of dark matter haloes and galaxies. One main difficulty in answering this question lies in the absence of a robust and natural way of identifying the large scale environments and their characteristics. This work summarizes the NEXUS+ formalism which extends and improves our multiscale scale-space MMF method. The new algorithm is very successful in tracing the Cosmic Web components, mainly due to its novel filtering of the density in logarithmic space. The method, due to its multiscale and hierarchical character, has the advantage of detecting all the cosmic structures, either prominent or tenuous, without preference for a certain size or shape. The resulting filamentary and wall networks can easily be characterized by their direction,…
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