Adaptive gravitational softening in gadget

• Published in: Monthly notices of the Royal Astronomical Society Vol. 417; no. 4; pp. 2846 - 2859
• Main Authors: Iannuzzi, Francesca, Dolag, Klaus
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 11.11.2011; Wiley-Blackwell; Oxford University Press
• Subjects: Astronomy; Clustering; Cosmology; cosmology: theory; Dark matter; Density; Earth, ocean, space; Equations of motion; Evolution; Exact sciences and technology; Formalism; gravitation; Gravity; large-scale structure of Universe; methods: numerical; Simulation; Small scale; Softening; gravitation; methods: numerical; large-scale structure of Universe; cosmology: theory; Gravitational force; Red shift; Gravitation; Numerical method; Equations of motion; Correlation functions; Large-scale structure; Space-time; Dark matter; Cosmology; Lagrangian system

Cosmological simulations of structure formation follow the collisionless evolution of dark matter starting from a nearly homogeneous field at early times down to the highly clustered configuration at redshift zero. The density field is sampled by a number of particles in number infinitely smaller th...