The Clustering of Galaxy Clusters - Synthetic Distributions and the Correlation Function Amplitude

Details The Clustering of Galaxy Clusters - Synthetic Distributions and the Correlation Function Amplitude The Clustering of Galaxy Clusters - Synthetic Distributions and the Correlation Function Amplitude

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.276.1116p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 276, NO. 4/OCT15, P.1116, 1995

Astronomy and Astrophysics

Astronomy

7

Scientific paper

We present a discussion of the relative amplitudes of the galaxy-galaxy and cluster-cluster correlation functions in terms of specific analytic models for the galaxy clustering process. To this end we examine the relative merits of various cluster finding algorithms: minimal spanning tree, friends-of-friends and wavelet decomposition. Then we look at specific models of the galaxy distribution: two variants of the Soneira- Peebles model and the multifractal distribution of Jones et al. These models are interesting because they reproduce various aspects of the observed galaxy distribution. Clusters of various richness can be defined by imposing a scale-independent threshold on the galaxy density field or from cluster-finding algorithms. The clustering models yield substantially different behaviours for ξ_cc_ as a function of cluster richness. The simplest variant of the Soneira-Peebles model in which the number of levels in the hierarchy is fixed fails to reproduce a richness-dependent ξ_cc_. Varying the number of levels randomly as suggested by Soneira & Peebles to fix the scaling relation between the two- and three-point galaxy correlation functions does produce the required richness dependence. The multifractal model also has a manifest richness dependence of the cluster correlation function amplitude, but the slope of the function varies systematically with richness. Whether or not this is in accord with the data is still an open question. An interesting result emerges from this investigation: the position of the first zero-crossing of ξ_cc_ as a function of cluster richness would be a sensitive discriminator of clustering models if it could be measured. The cluster correlation function contains information about the growth of structure in the Universe that cannot be simply obtained from the underlying galaxy distribution alone.

Affiliated with

Also associated with

No associations

Rating

The Clustering of Galaxy Clusters - Synthetic Distributions and the Correlation Function Amplitude does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Clustering of Galaxy Clusters - Synthetic Distributions and the Correlation Function Amplitude, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Clustering of Galaxy Clusters - Synthetic Distributions and the Correlation Function Amplitude will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1355533