2006/07/31 by D. Sarkar, Devdeep Sarkar, Hume A. Feldman +1
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics #Consistency (knowledge bases) #Flow (mathematics) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geometry #Mechanics #Peculiar velocity #Physics #Redshift #Stellar, planetary, and galactic studies #Vector field #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2006.11334.x
published as Mon.Not.Roy.Astron.Soc.375:691-697,2007 · 16 pages, 2 figures 2 tables, minor changes, reflects published version
openalex publication_date 2007/01/15 · arxiv created 2007/07/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present an analysis comparing the bulk-flow measurements for six recent peculiar velocity surveys, namely, ENEAR, SFI, RFGC, SBF and the Mark III singles and group catalogues. We study whether the directions of the bulk-flow estimates are consistent with each other and construct the full 3D bulk-flow vectors for each survey. We show that although the surveys differ in their geometry, galaxy morphologies, distance measures and measurement errors, their bulk flow vectors are expected to be highly correlated and in fact show impressive agreement in all cases. We found a combined weighted mean bulk motion of 330 ± 101 km s−1 towards l= 234°± 11° and b= 12°± 9° in a sphere with an effective depth of ∼4000 km s−1.