2007/11/30 by Yehuda Hoffman, Luis A. Martínez-Vaquero, Luis A. Martinez-Vaquero +3 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Cold dark matter #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Dwarf galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Hot dark matter #Local Group #Physics #Scientific Research and Discoveries #Supercluster (genetic) #Virgo Cluster #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2008.13034.x
10 pages, 7 figures, submitted to MNRAS
arxiv created 2008/01/24 · openalex publication_date 2008/03/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
To study the local Hubble flow, we have run constrained dark matter (DM) simulations of the Local Group (LG) in the concordance Λ cold dark matter (CDM) and open cold dark matter (OCDM) cosmologies, with identical cosmological parameters apart from the Λ term. The simulations were performed within a computational box of centred on the LG. The initial conditions were constrained by the observed peculiar velocities of galaxies and positions of X-ray nearby clusters of galaxies. The simulations faithfully reproduce the nearby large-scale structure, and in particular the Local Supercluster and the Virgo cluster. LG-like objects have been selected from the DM haloes so as to closely resemble the dynamical properties of the LG. Both the ΛCDM and OCDM simulations show very similar local Hubble flow around the LG-like objects. It follows that, contrary to recent statements, the dark energy (DE) does not manifest itself in the local dynamics.