202 citations · 797 across the 35 of their papers we have counts for
13 papers · 1 filter
The anisotropy of the power spectrum in periodic cosmological simulations
Gábor Rácz, István Szapudi, István Csabai +1
The classical gravitational force on a torus is anisotropic and always lower than Newton's law. We demonstrate the effects of periodicity in dark matter only -body simul…
A common explanation of the Hubble tension and anomalous cold spots in the CMB
András Kovács, Róbert Beck, István Szapudi +3
The standard cosmological paradigm narrates a reassuring story of a universe currently dominated by an enigmatic dark energy component. Disquietingly, its universal explaining powe…
Galaxy shape measurement with convolutional neural networks
Dezső Ribli, László Dobos, István Csabai
We present our results from training and evaluating a convolutional neural network (CNN) to predict galaxy shapes from wide-field survey images of the first data release of the Dar…
StePS: A Multi-GPU Cosmological N-body Code for Compactified Simulations
Gábor Rácz, István Szapudi, László Dobos +2
We present the multi-GPU realization of the StePS (Stereographically Projected Cosmological Simulations) algorithm with MPI-OpenMP-CUDA hybrid parallelization and nearly ideal scal…
Compactified Cosmological Simulations of the Infinite Universe
Gábor Rácz, István Szapudi, István Csabai +1
We present a novel -body simulation method that compactifies the infinite spatial extent of the Universe into a finite sphere with isotropic boundary conditions to follow the ev…
Concordance cosmology without dark energy
Gábor Rácz, László Dobos, Róbert Beck +2
According to the separate universe conjecture, spherically symmetric sub-regions in an isotropic universe behave like mini-universes with their own cosmological parameters. This is…