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Morphological fluctuations of large-scale structure: the PSCz survey

M. Kerscher·K. Mecke·J. Schmalzing·C. Beisbart·T. Buchert·H. Wagner
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Abstract

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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M. Kerscher, K. Mecke, J. Schmalzing, C. Beisbart, T. Buchert, H. Wagner. 2001-07-10. Morphological fluctuations of large-scale structure: the PSCz survey. https://doi.org/10.1051/0004-6361%3A20010604

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