1997/11/06 by Stephen D. Landy, Alexander S. Szalay, Thomas J. Broadhurst · 3 citations
Mathematics · Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics #Correlation function (quantum field theory) #Deconvolution #Distribution (mathematics) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geodesy #Geography #Mathematical analysis #Mathematics #Optics #Physics #Redshift #Redshift survey #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.1086/311197
14 pages Latex including 3 PS figures and 1 table submitted ApJL
arxiv created 1997/11/06 · openalex publication_date 1998/02/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a novel measurement of the pairwise peculiar velocity distribution function of galaxies on scales r <3200 km s -1 in the Las Campanas Redshift Survey. The distribution is well described by a scale-independent exponential with a width τ, where σ 12 = √2τ=363 km s -1 . The signal is very stable. Results from the northern and southern sets of slices agree within ±13 km s -1 , and the fluctuations among the six individual survey slices vary as ±44 km s -1 . The distribution was determined using a Fourier-space deconvolution of the redshift-space distortions in the correlation function. This technique is insensitive to the effect of rich clusters in the survey and recovers the entire distribution function rather than just its second moment. Taken together with the large effective volume of the survey, 6.0 × 10 6 h -1 Mpc 3 , we believe this to be a definitive result for r -band-selected galaxies with absolute magnitudes -18.5 < M r < -22.5 and z < 0.2.