Other
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...413...39a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 413, no. 1, p. 39-47.
Other
13
Galactic Clusters, Galactic Evolution, Galactic Structure, Plasma Bubbles, Density Distribution, Fractals, Relic Radiation
Scientific paper
We test the hypothesis that the large-scale cluster and galaxy distribution are generated by the dynamics of primordial bubbles, which would naturally mimic a fractal distribution. We particularly focus on the recent predictions for the bubble spectrum resulting from a first-order phase transition in extended inflation. Observations of the correlation function, show that they can indeed be reproduced in these models. Furthermore, the void filling fraction turns out to be larger than 75 percent, as required. The observations of the cosmic microwave background (upper limits to the small and large angular scale anisotropy and to the spectral distortion of the blackbody curve), indicate that, in order to avoid conflict with them, very steep bubble spectra are required. The simplest models of extended inflation cannot give successful candidates. The topology of our model may turn out to be even spongy and not necessarily bubbly, since during their evolution bubbles overlap and interlock with each other.
Amendola Luca
Occhionero Franco
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