1999/11/29 by Avishai Dekel, Dekel, Avishai
Earth and Planetary Sciences · Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Gamma-ray bursts and supernovae #Geophysics and Gravity Measurements #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9911501
8 pages LaTeX, 8 embedded figures. paspconf.sty. Higher quality figs from ftp://alf.fiz.huji.ac.il/pub/dekel/vic99/ as adekel*_l.ps.gz (*=1-8). In "Cosmic Flows: Towards an Understanding of Large-Scale Structure", eds S. Courteau, M.A. Strauss, & J.A. Willick, ASP Conf. Series
arxiv created 1999/11/29 · openalex publication_date 1999/11/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
I address the following issues: All bulk velocity measurements (but one) are consistent with our standard gravitational instability theory. New accurate data and reconstruction methods allow high-resolution dynamical analysis nearby, revealing Virgo, Ursa Major and Fornax as attractors. Large peculiar-velocity surveys enable robust reconstruction of the dynamical fields on the Great-Attractor scale. A decomposition of the velocity field into its local and tidal components indicates the presence of big perturbations further away. Cluster velocities start exploring very large scales, revealing Coma, Shapely and other mass enhancements, and constraining a possible local Hubble bubble. Supernovae type Ia (SNIa) are very promising for cosmic flow analysis. Peculiar velocities do provide unique valuable constraints on cosmological parameters, e.g., 0.3