429 citations · 4.1k across the 77 of their papers we have counts for
12 papers · 1 filter
The Spine of the Cosmic Web
Miguel A. Aragon-Calvo, Erwin Platen, Rien van de Weygaert +1
We present the SpineWeb framework for the topological analysis of the Cosmic Web and the identification of its walls, filaments and cluster nodes. Based on the watershed segmentati…
Future Evolution of Bound Superclusters in an Accelerating Universe
Pablo A. Araya-Melo, Andreas Reisenegger, Andres Meza +3
The evolution of marginally bound supercluster-like objects in an accelerating LambdaCDM Universe is followed, by means of cosmological simulations, from the present time to an exp…
Cosmic Order out of Primordial Chaos: a tribute to Nikos Voglis
Bernard J. T. Jones, Rien van de Weygaert
Nikos Voglis had many astronomical interests, among them was the question of the origin of galactic angular momentum. In this short tribute we review how this subject has changed s…
The Cosmic Web: Geometric Analysis
Rien van de Weygaert, Willem Schaap
The lecture notes describe the Delaunay Tessellation Field Estimator for Cosmic Web analysis. The high sensitivity of Voronoi/Delaunay tessellations to the local point distribution…
A Cosmic Watershed: the WVF Void Detection Technique
Erwin Platen, Rien van de Weygaert, Bernard J. T. Jones
On megaparsec scales the Universe is permeated by an intricate filigree of clusters, filaments, sheets and voids, the Cosmic Web. For the understanding of its dynamical and hierarc…
The Multiscale Morphology Filter: Identifying and Extracting Spatial Patterns in the Galaxy Distribution
Miguel A. Aragon-Calvo, Bernard J. T. Jones, Rien van de Weygaert +1
We present here a new method, MMF, for automatically segmenting cosmic structure into its basic components: clusters, filaments, and walls. Importantly, the segmentation is scale i…
Tessellation Reconstruction Techniques
Rien van de Weygaert, Willem Schaap
The application of Voronoi and Delaunay tessellation based methods for reconstructing continuous fields from discretely sampled data sets is discussed. The succesfull operation as…
The Omega dependence of the velocity divergence distribution
F. Bernardeau, R. van de Weygaert, E. Hivon +1
Analytical studies based on perturbative theory have shown that the moments of the Probability Distribution Function (PDF) of the local smoothed velocity divergence are expected to…
A new method for accurate velocity statistics estimation
Francis Bernardeau, Rien van de Weygaert
We introduce two new methods to obtain reliable velocity field statistics from N-body simulations, or indeed from any general density and velocity fluctuation field sampled by disc…
Constraining Peaks in Gaussian Primordial Density Fields: an Application of the Hoffman-Ribak Method
Rien van de Weygaert, Edmund Bertschinger
We develop an algorithm for setting up initial Gaussian random density and velocity fields containing one or more peaks or dips, in an arbitrary cosmological scenario. The intentio…
The Two--Point Correlation Function and the Size of Voids
Dalia S. Goldwirth, Luiz Nicolaci da Costa, Rien Van de Weygaert
Under the assumption of a void-filled Universe we investigate if the characteristic scale of voids can be determined from existing surveys. We use the Voronoi tessellation to creat…
Shear Fields and the Evolution of Galactic-Scale Density Peaks
Rien van de Weygaert, Arif Babul
We present preliminary results of our investigation into the influence of shear fields on the evolution of galactic scale fluctuations in a primordial Gaussian random density field…