NEXUS: Tracing the cosmic web connection

By Marius Cautun, Rien van de Weygaert, Bernard J. T. Jones. 2012

165 citations recorded by the source corpus.

We introduce the NEXUS algorithm for the identification of cosmic web environments: clusters, filaments, walls and voids. This is a multiscale and automatic morphological analysis tool that identifies all the cosmic structures in a scale free way, without preference for a certain size or shape. We develop the NEXUS method to incorporate the density, tidal field, velocity divergence and velocity shear as tracers of the cosmic web. We also present the NEXUS+ procedure which, taking advantage of a novel filtering of the density in logarithmic space, is very successful at identifying the filament and wall environments in a robust and natural way. To assess the algorithms we apply them to an N-body simulation. We find that all methods correctly identify the most prominent filaments and walls, while there are differences in the detection of the more tenuous structures. In general, the structures traced by the density and tidal fields are clumpier and more rugged than those present in the velocity divergence and velocity shear fields. We find that the NEXUS+ method captures much better the filamentary and wall networks and is successful in detecting even the fainter structures. We also confirm the efficiency of our methods by examining the dark matter particle and halo distributions.

Subfields: Astronomy and Astrophysics, Computer Vision and Pattern Recognition, Ecology

View Paper: https://www.semanticscholar.org/paper/c98651188b6f26a76b76036bb5f98e8736992f41

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Volker Springel
2. Thierry Sousbie
3. Carlos S. Frenk
4. Marius Cautun
5. Oliver Hahn
6. James S. Bullock
7. P. Hopkins
8. Simon D. M. White

In Computer Vision and Pattern Recognition

1. Thierry Sousbie
2. Oliver Hahn
3. Tom Abel
4. Rien van de Weygaert
5. Bernard J. T. Jones
6. Marius Cautun
7. Carlos S. Frenk
8. Erwin Platen

In Ecology

1. Thierry Sousbie
2. Mark Neyrinck
3. Marius Cautun
4. Rien van de Weygaert
5. Carlos S. Frenk
6. Bernard J. T. Jones
7. Francisco-Shu Kitaura
8. Tom Abel

Citations in the corpus

• Tracing the cosmic web (2017, methodology): “…large class of approaches exploits the morphological and (local) geometric information included in the Hessian of the density, tidal or velocity shear fields (e.g. Aragón-Calvo et al. 2007a; Hahn et al. 2007a; Forero-Romero et al. 2009; Bond et al. 2010a; Libeskind et al. 2012; Cautun et al. 2013).”
• Evolution of the cosmic web (2014, methodology): “We do so in a self-consistent way, by employing the NEXUS and NEXUS+ (Cautun et al. 2013, hereafter CWJ13) methods to identify in a scale-free way all the features of the cosmic web.”