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Titolo: Small deviations from Gaussianity and the galaxy cluster abundance evolution
Autore: Ribeiro, ALB; Wuensche, CA; Letelier, PS;
- Indirizzi:
- Univ Estadual Campinas, IMECC, Dept Matemat Aplicada, BR-13083970 Campinas, SP, Brazil Univ Estadual Campinas Campinas SP Brazil BR-13083970 BCpinas, SP, Brazil INPE, Div Astrofis, BR-12201970 Sao Paulo, Brazil INPE Sao Paulo Brazil BR-12201970 BCrofis, BR-12201970 Sao Paulo, Brazil
- Titolo Testata:
- ASTROPHYSICAL JOURNAL
fascicolo: 1,
volume: 539,
anno: 2000,
parte:, 1
pagine: 1 - 4
- SICI:
- 0004-637X(20000810)539:1<1:SDFGAT>2.0.ZU;2-6
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- STATISTICS; FLUCTUATIONS; MODEL;
- Keywords:
- cosmology : theory; galaxies : clusters : general; large-scale structure of universe;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 26
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Ribeiro, ALB Univ Estadual Campinas, IMECC, Dept Matemat Aplicada, BR-13083970 Campinas, SP, Brazil Univ Estadual Campinas Campinas SP Brazil BR-13083970 BCazil
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- Citazione:
- A.L.B. Ribeiro et al., "Small deviations from Gaussianity and the galaxy cluster abundance evolution", ASTROPHYS J, 539(1), 2000, pp. 1-4
Abstract
In this paper, we raise the hypothesis that the density fluctuation held, which originates the growth of large-scale structures, is a combination of two or more distributions, instead of assuming that the observed distribution of matter stems from a single Gaussian held produced in the very early universe, as is widely accepted. By applying the statistical analysis of finite-mixture distributions to a specific combination of Gaussian plus non-Gaussian random fields, we studied the case in which just a small departure from Gaussianity is allowed. Our results suggest that even a very small level of non-Gaussianity may introduce significant changes in the cluster abundance evolution rate.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/05/13 alle ore 11:17:44