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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 | Affiliation: | JHU, 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 | 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. | Source: | arXiv, astro-ph/0101238 | Services: | Forum | Review | PDF | Favorites |
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