Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.136..393l&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 136, no. 2, Aug. 1987, p. 393-407.
Astronomy and Astrophysics
Astrophysics
2
Cosmology, Fractals, Galactic Evolution, Galactic Structure, Turbulence
Scientific paper
Observations show that the geometry of the large-scale distribution of galaxies is like a self-similar sponge which can be regarded as a fractal in fractal geometry (the Sierpinski sponge) with the fractal dimension Df = 3 - gamma (gamma = 1.7-1.8) being the index in the two-point correlation function. It is suggested that a new scheme should be used to explain the origin of galaxies and large-scale structure. In this model, it is assumed that the density perturbations in the early universe are adiabatic, and that, once they come within the horizon, they might produce the vortices of the fractal turbulence because of the Thomson drag. A model of the fractal turbulence is also given in this paper. The results obtained show that the basic characteristics of the galaxies, mass M(g), angular momentum J(g), and the large-scale structure (fractal dimension Df) can be explained, if the spectrum of early perturbations is the scale-free Zel'dovich spectrum.
Deng Zu-Gang
Liu Yong-Zhen
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