Nbody 3D Histograms dataset

<br> This is the N-body simulations 3D images dataset used in the following paper:<br> <strong>Scalable Generative Adversarial Networks for Multi-dimensional Images</strong><br> <em>Ankit Srivastava, Nathanaël Perraudin, Aurelien Lucchi, Tomasz Kacprzak, Thomas Hofmann, Alexandre Refregier, Adam Amara</em><br> https://arxiv.org/abs/1908.05519 @inproceedings{perraudin2019cosmological,<br> title = {Cosmological N-body simulations: a challenge for scalable generative models},<br> author = {Nathana\"el, Perraudin and Ankit, Srivastava and Kacprzak, Tomasz and Lucchi, Aurelien and Hofmann, Thomas and R{\'e}fr{\'e}gier, Alexandre},<br> year = {2019},<br> archivePrefix = {arXiv},<br> eprint = {1908.05519},<br> url = {https://arxiv.org/abs/1908.05519},<br> } The dataset does not contain the Nbody simulations as they have a very large size. Instead, we sliced the space into 256 x 256 x 256 cubical areas and counted the number of particules in each area. The result are 3D histograms, where the number of particles is a proxy for matter density. If you work with this dataset, you might be interested in this code as well https://github.com/nperraud/3DcosmoGAN Note that a the same Nbody simulation were used in this paper, but with a different way of building the histogram.<br> <strong>Fast Cosmic Web Simulations with Generative Adversarial Networks</strong><br> <em>Andres C Rodriguez, Tomasz Kacprzak, Aurelien Lucchi, Adam Amara, Raphael Sgier, Janis Fluri, Thomas Hofmann, Alexandre Réfrégier</em><br> https://arxiv.org/abs/1801.09070v1 <br> N-body simulation evolves a cosmological matter distribution over time, starting from soon after the big bang.<br> It represents matter density distribution as a finite set of massive particles, typically order of trillions.<br> The positions of these particles are modified due to gravitational forces and expansion of the cosmological volume due to cosmic acceleration.<br> N-body simulations use periodic boundary condition, where particles leaving the volume on one face enter it back from the opposite side. ## Short description of the data generation from Rordiguez et al. 2018: We created N-body simulations of cosmic structures in boxes of size 100 Mpc and 500 Mpc with 512^3 and 1,024^3 particles respectively.<br> We used L-PICOLA [21] to create 10 and 30 independent simulation boxes for both box sizes.<br> The cosmological model used was ΛCDM (Cold Dark Matter) with Hubble constant H0 = 100, h = 70 km s−1 Mpc−1,<br> dark energy density Omega_Lambda = 0.72 and matter density Omega_m = 0.28.<br> We used the particle distribution at redshift z = 0. <br> For additional information, please check the README.md