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28 March 2024
 
  » arxiv » astro-ph/0101238

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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 ;
Date 15 Dec 2000
Journal Astron.Astrophys. 373 (2001) 1-11
Subject astro-ph
AffiliationJHU, Univ. of Munich), K.Mecke (Univ. of Wuppertal), J.Schmalzing (TAC, Univ. of Munich), C.Beisbart (Univ. of Munich), T.Buchert (NAO Tokyo, Univ. of Geneve, Univ. of Munich), and H.Wagner (Univ. of Munich
AbstractIn 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.
Source arXiv, astro-ph/0101238
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