ORIGAMI: Delineating Cosmic Structures with Phase-Space Folds
Abstract
Structures like galaxies and filaments of galaxies in the Universe come about from the origami-like folding of an initially flat three-dimensional manifold in 6D phase space. The ORIGAMI method identifies these structures in a cosmological simulation, delineating the structures according to their outer folds. Structure identification is a crucial step in comparing cosmological simulations to observed maps of the Universe. The ORIGAMI definition is objective, dynamical and geometric: filament, wall and void particles are classified according to the number of orthogonal axes along which dark-matter streams have crossed. Here, we briefly review these ideas, and speculate on how ORIGAMI might be useful to find cosmic voids.
Cite
@article{arxiv.1309.4787,
title = {ORIGAMI: Delineating Cosmic Structures with Phase-Space Folds},
author = {Mark C. Neyrinck and Bridget L. Falck and Alex S. Szalay},
journal= {arXiv preprint arXiv:1309.4787},
year = {2015}
}
Comments
Talk summary to appear in the Proceedings of the 13th Marcel Grossmann Meeting (MG13), Stockholm, July 2012. 3 pages, 3 figures