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Дата изменения: Wed May 29 18:21:04 1996
Дата индексирования: Tue Oct 2 18:02:42 2012
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Поисковые слова: deep sky
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Title:
Three-dimensional structure of the universe and regions devoid of galaxies
Authors:
DOROSHKEVICH, A. G.; SHANDARIN, S. F.; ZELDOVICH, IA. B.
Affiliation:
AC(Akademiia Nauk SSSR, Institut Prikladnoi Matematiki, Moscow, USSR)
Journal:
Comments on Modern Physics, Part C - Comments on Astrophysics, vol. 9, no. 6, 1982, p. 265-273.
Publication Date:
00/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
BIG BANG COSMOLOGY, GALACTIC CLUSTERS, SPACE DENSITY, UNIVERSE, FRAGMENTATION, HYDROGEN CLOUDS, INTERSTELLAR GAS, SPATIAL DISTRIBUTION, VOIDS
Bibliographic Code:
1982CoAp....9..265D

Abstract

The fragmentation theory of the formation of the large scale structure of the universe is explained and contrasted with the continuous clustering theory. Phase changes in the very early universe cause perturbations which give rise to pancakes whose coolness, density, and neutrality make them suitable for galaxy formation. As galaxies form, the radiation they give out heats, rarefies, and ionizes the remaining gas, inhibiting further galaxy formation. These low density regions are responsible for the large voids observed in the universe. The continuous clustering theory assumes that galaxies were originally distributed with nearly constant density, and that their mutual gravitational attraction caused clusters to form. The existence of large voids is very difficult to explain with this theory. A direct test of which theory is correct would be the detection of gas in voids. The fragmentation theory predicts that the gas would consist entirely of hydrogen and helium, while the continuous clustering theory predicts the existence of heavy elements. 
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