2002/02/28 by P. Heinämäki, P. Heinamki, J. Einasto +4 · 15 citations
Physics and Astronomy · #Amplitude #Astrophysics #Astrophysics and Star Formation Studies #Function (biology) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Materials science #Optics #Physics #Range (aeronautics) #Redshift #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.1051/0004-6361:20021498
published in Astronomy and Astrophysics 397(1), 63-70 (EDP Sciences) · 9 pages, 7 figures, AA accepted
arxiv created 2002/10/23 · openalex publication_date 2002/12/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have determined the mass function of loose groups of galaxies in the Las Campanas Redshift Survey. Loose groups of galaxies in the LCRS range in mass from to . We find that the sample is almost complete for masses in the interval . Comparison of the observed mass function with theoretical mass functions obtained from N-body simulations shows good agreement with a CDM model with the parameters , and the amplitude of perturbations about . For smaller masses the mass function of LCRS loose groups flattens out, differing considerably from the group mass function found by Girardi & Giuricin (2000) and from mass functions obtained by numerical simulations.