Morphological fluctuations of large-scale structure: the PSCz survey

Details Morphological fluctuations of large-scale structure: the PSCz survey Morphological fluctuations of large-scale structure: the PSCz survey

2001-01-15

arxiv.org/abs/astro-ph/0101238v2

Astron.Astrophys.373:1-11,2001

Astronomy and Astrophysics

Astrophysics

aa style, 13 pages, 9 figures, matching accepted version

Scientific paper

10.1051/0004-6361:20010604

In a follow-up study to a previous analysis of the IRAS 1.2Jy catalogue, we quantify the morphological fluctuations in the PSCz survey. We use a variety of measures, among them the family of scalar Minkowski functionals. We confirm the existence of significant fluctuations that are discernible in volume-limited samples out to 200Mpc/h. In contrast to earlier findings, comparisons with cosmological N-body simulations reveal that the observed fluctuations roughly agree with the cosmic variance found in corresponding mock samples. While two-point measures, e.g. the variance of count-in-cells, fluctuate only mildly, the fluctuations in the morphology on large scales indicate the presence of coherent structures that are at least as large as the sample.

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