2009/12/31 by Guilhem Lavaux
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics #Cold dark matter #Correlation function (quantum field theory) #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Physics #Quantum mechanics #Redshift #Redshift survey #Scientific Research and Discoveries #Universe #astro-ph.CO
paper · pdf · doi:10.1111/j.1365-2966.2010.16719.x
published as Mon.Not.Roy.Astron.Soc.406:1007-1013,2010 · 8 pages, 5 figures, accepted by MNRAS
arxiv created 2010/03/24 · openalex publication_date 2010/04/01 · arxiv updated 2014/11/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use the formalism of constrained Gaussian random fields to compute a precise large-scale simulation of the 60 h−1 Mpc volume of our local Universe. We derive the constraints from the reconstructed peculiar velocities of the 2MASS (Two Micron All-Sky Survey) Redshift Survey (2MRS). We obtain a correlation of 0.97 between the log density field of the dark matter distribution of the simulation and the log density of observed galaxies of the local Universe. We achieve a good comparison of the simulated velocity field to the observed velocity field obtained from the galaxy distances of the Nearby Galaxy Catalog 3000 km s−1 (NBG-3k, Tully et al.). At the end, we compare the two-point correlation function of both the 2MRS galaxies and the dark matter particles of the simulation. We conclude that this method is a very promising technique for exploring the dynamics and structure of the Universe in our neighbourhood.