Non-Gaussian morphology on large scales: Minkowski functionals of the REFLEX cluster catalogue

Details Non-Gaussian morphology on large scales: Minkowski functionals of the REFLEX cluster catalogue Non-Gaussian morphology on large scales: Minkowski functionals of the REFLEX cluster catalogue

2001-05-09

arxiv.org/abs/astro-ph/0105150v2

A&A, 377 (2001) 1

Astronomy and Astrophysics

Astrophysics

16 pages, 9 figures, version accepted in A&A, some clarifications

Scientific paper

10.1051/0004-6361:20011063

In order to quantify higher-order correlations of the galaxy cluster distribution we use a complete family of additive measures which give scale-dependent morphological information. Minkowski functionals can be expressed analytically in terms of integrals of n-point correlation functions. They can be compared with measured Minkowski functionals of volume limited samples extracted from the REFLEX survey. We find significant non-Gaussian features in the large-scale spatial distribution of galaxy clusters. A Gauss-Poisson process can be excluded as a viable model for the distribution of galaxy clusters at the significance level of 95%.

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