429 citations · 3k across the 32 of their papers we have counts for
33 papers
Cosmic averaging over multiscaled structure: on foliations, gauges and backreaction
Dave B. H. Verweg, Bernard J. T. Jones, Rien van de Weygaert
The observation that accelerated cosmic expansion is dominant since the Mega-parsec cosmic structure became nonlinear seems like an extraordinary coincidence, unless the accelerati…
Averaging over cosmic structure: Cosmological backreaction and the gauge problem
Dave B. H. Verweg, Bernard J. T. Jones, Rien van de Weygaert
The observation that accelerated cosmic expansion appears to start around the time that nonlinear cosmic structure is appearing seems like an extraordinary coincidence, unless the…
Topological bias: How haloes trace structural patterns in the cosmic web
Raul Bermejo, Georg Wilding, Rien van de Weygaert +3
We trace the connectivity of the cosmic web as defined by haloes in the Planck-Millennium simulation using a persistence and Betti curve analysis. We normalise clustering up to the…
Persistent homology of the cosmic web. I: Hierarchical topology in CDM cosmologies
Georg Wilding, Keimpe Nevenzeel, Rien van de Weygaert +5
Using a set of CDM simulations of cosmic structure formation, we study the evolving connectivity and changing topological structure of the cosmic web using state-of-the-art tool…
Caught in the cosmic web: Environmental effect on halo concentrations, shape, and spin
Wojciech A. Hellwing, Marius Cautun, Rien van de Weygaert +1
Using a set of high-resolution simulations we study the statistical correlation of dark matter halo properties with the large-scale environment. We consider halo populations split…
Unexpected Topology of the Temperature Fluctuations in the Cosmic Microwave Background
Pratyush Pranav, Robert J. Adler, Thomas Buchert +5
We study the topology generated by the temperature fluctuations of the Cosmic Microwave Background (CMB) radiation, as quantified by the number of components and holes, formally gi…
Topology and Geometry of Gaussian random fields I: on Betti Numbers, Euler characteristic and Minkowski functionals
Pratyush Pranav, Rien van de Weygaert, Gert Vegter +6
This study presents a numerical analysis of the topology of a set of cosmologically interesting three-dimensional Gaussian random fields in terms of their Betti numbers , $β_1…
The Cosmic Ballet: spin and shape alignments of haloes in the cosmic web
Punyakoti Ganeshaiah Veena, Marius Cautun, Rien van de Weygaert +4
We investigate the alignment of haloes with the filaments of the cosmic web using an unprecedently large sample of dark matter haloes taken from the P-Millennium CDM cosmologica…
Tracing the cosmic web
Noam I Libeskind, Rien van de Weygaert, Marius Cautun +27
The cosmic web is one of the most striking features of the distribution of galaxies and dark matter on the largest scales in the Universe. It is composed of dense regions packed fu…
The structural elements of the cosmic web
Bernard J. T. Jones, Rien van de Weygaert
In 1970 Zel'dovich published a far-reaching paper presenting a simple equation describing the nonlinear growth of primordial density inhomogeneities. The equation was remarkably su…
The Topology of the Cosmic Web in Terms of Persistent Betti Numbers
Pratyush Pranav, Herbert Edelsbrunner, Rien van de Weygaert +4
We introduce a multiscale topological description of the Megaparsec weblike cosmic matter distribution. Betti numbers and topological persistence offer a powerful means of describi…
Understanding the cosmic web
Marius Cautun, Rien van de Weygaert, Bernard J. T. Jones +1
We investigate the characteristics and the time evolution of the cosmic web from redshift, z=2, to present time, within the framework of the NEXUS+ algorithm. This necessitates the…
Sub-Megaparsec Individual Photometric Redshift Estimation from Cosmic Web Constraints
Miguel A. Aragon-Calvo, Rien van de Weygaert, Bernard J. T. Jones +1
We present a method, PhotoWeb, for estimating photometric redshifts of individual galaxies, and their equivalent distance, with megaparsec and even sub-megaparsec accuracy using th…
Subhalo statistics of galactic halos: beyond the resolution limit
Marius Cautun, Wojciech A. Hellwing, Rien van de Weygaert +3
We study the substructure population of Milky Way (MW)-mass halos in the CDM cosmology using a novel procedure to extrapolate subhalo number statistics beyond the resolution lim…
Milky Way mass constraints from the Galactic satellite gap
Marius Cautun, Carlos S. Frenk, Rien van de Weygaert +2
We use the distribution of maximum circular velocities, , of satellites in the Milky Way (MW) to constrain the virial mass, , of the Galactic halo under an assume…
Evolution of the cosmic web
Marius Cautun, Rien van de Weygaert, Bernard J. T. Jones +1
The cosmic web is the largest scale manifestation of the anisotropic gravitational collapse of matter. It represents the transitional stage between linear and non-linear structures…
Betti numbers of Gaussian fields
Changbom Park, Pratyush Pranav, Pravabati Chingangbam +6
We present the relation between the genus in cosmology and the Betti numbers for excursion sets of three- and two-dimensional smooth Gaussian random fields, and numerically investi…
Alpha, Betti and the Megaparsec Universe: on the Topology of the Cosmic Web
Rien van de Weygaert, Gert Vegter, Herbert Edelsbrunner +13
We study the topology of the Megaparsec Cosmic Web in terms of the scale-dependent Betti numbers, which formalize the topological information content of the cosmic mass distributio…
Adhesion and the Geometry of the Cosmic Web
Johan Hidding, Rien van de Weygaert, Gert Vegter +1
We present a new way to formulate the geometry of the Cosmic Web in terms of Lagrangian space. The Adhesion model has an ingenious geometric interpretation out of which the spine o…
Nexus of the Cosmic Web
Marius Cautun, Rien van de Weygaert, Bernard J. T. Jones +2
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.…
NEXUS: Tracing the Cosmic Web Connection
Marius Cautun, Rien van de Weygaert, Bernard J. T. Jones
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…
The Sticky Geometry of the Cosmic Web
Johan Hidding, Rien van de Weygaert, Gert Vegter +2
In this video we highlight the application of Computational Geometry to our understanding of the formation and dynamics of the Cosmic Web. The emergence of this intricate and perva…
Probing Dark Energy with Alpha Shapes and Betti Numbers
Rien van de Weygaert, Pratyush Pranav, Bernard J. T. Jones +8
We introduce a new descriptor of the weblike pattern in the distribution of galaxies and matter: the scale dependent Betti numbers which formalize the topological information conte…
Structural Analysis of the SDSS Cosmic Web I.Nonlinear Density Field Reconstructions
Erwin Platen, Rien van de Weygaert, Bernard J. T. Jones +2
We investigate the ability of three reconstruction techniques to analyze and investigate weblike features and geometries in a discrete distribution of objects. The three methods ar…