Mathematics – Probability
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.170..319m&link_type=abstract
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640
Mathematics
Probability
1
Galactic Clusters, Galactic Evolution, Nonlinear Systems, Power Spectra, White Noise, Density Distribution, Gravitational Fields, Probability Distribution Functions, Stellar Luminosity
Scientific paper
The rms density fluctuations are calculated using the ID Zel'dovich approximation implemented with a virialization scheme for the very dense fluctuations. The results are quite different from those found in the linear regime with strong implications for the normalization of the power spectrum of the initial density fluctuations. The nonlinear two-point correlation function is also calculated for matter with an initial spectrum (equivalent to white noise in 3D) of fluctuations; differences from the linear approximation appear at scales much larger than those considered previously of 10/h Mpc.
Luis Sanz José
Martinez-Gonzalez Enrique
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