140 citations · 1.4k across the 46 of their papers we have counts for
46 papers
Complex-time singular structure of the 1D Hou-Luo model
Cornelius Rampf, Sai Swetha Venkata Kolluru
Starting from smooth initial data, we investigate the complex-time analytic structure of the one-dimensional Hou--Luo (HL) model, a wall approximation of the three-dimensional axis…
Post-collapse Lagrangian perturbation theory in three dimensions
Shohei Saga, Stéphane Colombi, Atsushi Taruya +2
The gravitational collapse of collisionless matter leads to shell-crossing singularities that challenge the applicability of standard perturbation theory. Here, we present the firs…
Angular bispectrum of matter number counts in cosmic structures
Thomas Montandon, Enea Di Dio, Cornelius Rampf +1
The bispectrum of galaxy number counts is a key probe of large-scale structure, offering insights into the initial conditions of the Universe, the nature of gravity, and cosmologic…
BullFrog: Multi-step perturbation theory as a time integrator for cosmological simulations
Cornelius Rampf, Florian List, Oliver Hahn
Modelling the cosmic large-scale structure can be done through numerical N-body simulations or by using perturbation theory. Here, we present an N-body approach that effectively im…
Starting Cosmological Simulations from the Big Bang
Florian List, Oliver Hahn, Cornelius Rampf
The cosmic large-scale structure (LSS) provides a unique testing ground for connecting fundamental physics to astronomical observations. Modeling the LSS requires numerical -bod…
Fast and accurate collapse-time predictions for collisionless matter
Cornelius Rampf, Shohei Saga, Atsushi Taruya +1
We consider the gravitational collapse of collisionless matter seeded by three crossed sine waves with various amplitudes, also in the presence of a linear external tidal field. We…