2017/08/31 by Christian Fidler, Thomas Tram, Cornelius Rampf +3 · 42 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #General relativity #High-Energy Particle Collisions Research #Limit (mathematics) #Metric (unit) #Newtonian dynamics #Newtonian fluid #Newtonian limit #Pulsars and Gravitational Waves Research #Relativistic quantum chemistry #Theory of relativity #astro-ph.CO #gr-qc
paper · pdf · doi:10.1088/1475-7516/2017/12/022
published in Journal of Cosmology and Astroparticle Physics 2017(12), 022 (Institute of Physics) · 22 pages, 3 figures; accepted for publication at JCAP
openalex created_date 2017/08/31 · arxiv created 2017/11/29 · openalex publication_date 2017/12/11 · arxiv updated 2017/12/12 · openalex updated_date 2026/08/05
We show how standard Newtonian N-body simulations can be interpreted in terms of the weak-field limit of general relativity by employing the recently developed Newtonian motion gauge. Our framework allows the inclusion of radiation perturbations and the non-linear evolution of matter. We show how to construct the weak-field metric by combining Newtonian simulations with results from Einstein-Boltzmann codes. We discuss observational effects on weak lensing and ray tracing, identifying important relativistic corrections.