2001/11/01 by L. Infante, Leopoldo Infante, Michael A. Strauss +22
Mathematics · Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Cluster analysis #Correlation #Correlation function (quantum field theory) #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geometry #Logarithm #Mathematical analysis #Mathematics #Physics #Quantum mechanics #Sky #Statistics #astro-ph
paper · pdf · doi:10.1086/338424
published as Astrophys.J. 567 (2002) 155 · 12 pages. ApJ, in press
arxiv created 2001/11/01 · openalex publication_date 2002/03/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We identify close pairs of galaxies from 278 deg 2 of Sloan Digital Sky Survey commissioning imaging data. The pairs are drawn from a sample of 330,041 galaxies with 18 < r * < 20. We determine the angular correlation function of galaxy pairs and find it to be stronger than the correlation function of single galaxies by a factor of 2.9 ± 0.4. The two correlation functions have the same logarithmic slope of 0.77. We invert Limber's equation to estimate the three-dimensional correlation functions; we find clustering lengths of r 0 = 4.2 ± 0.4 h -1 Mpc for galaxies and 7.8 ± 0.7 h -1 Mpc for galaxy pairs. These results agree well with the global richness dependence of the correlation functions of galaxy systems.