Astronomy and Astrophysics – Astronomy
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..340m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 15, 1991, p. 340-347. Research supported by SE
Astronomy and Astrophysics
Astronomy
2
Astronomical Models, Galactic Clusters, Cross Correlation, Spatial Distribution
Scientific paper
This paper presents a calculation of the contribution that galaxies in clusters make toward the clustering exhibited by all galaxies. It is shown that, within observational uncertainties, cluster galaxies may be responsible for all the clustering measured by the galaxy-galaxy correlatioan function. This accounts for the apparent paradox that the two-point correlation function in redshift space is elongated along the line-of-sight on scales where the galaxy-galaxy correlation function is significantly less than unity. It has previously been argued that the elongation is a direct indication of nonlinear dynamical effects. This result also suggests that n-point correlation functions do little more than probe cluster structure on scales up to 10/h Mpc. The variance of the galaxy density field is also considered and used to place constraints on the amplitude of the cluster-galaxy cross-correlation function.
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