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06 October 2024
 
  » arxiv » astro-ph/9605151

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Gravitational Instability for a Multifluid Medium in an Expanding Universe
D. Fargion ; astro-ph/9605133 ; PostScript ; PDF ; Other formats ; SLAC-SPIRES HEP ; to ; by ; NASA ADS ;
Date 24 May 1996
Journal Nuovo Cim. 77B (1983) 111-127
AbstractWe consider the gravitational clustering of a multicomponent fluid in an expanding Newtonian universe, taking into account the mutual gravitational interactions of the medium. We obtain a set of exact and approximate solutions for two fluid components and for several fluid components: primordial hydrogen and helium or cosmological massive neutrinos of different mass and/or velocity distribution may be described by these solutions. The ratio between the two fluid perturbations, even if originally equal to unity, changes monotonically with time; this phenomenon leads to different epochs for nonlinear clustering that may be reflected into different epochs of galaxy formation.
Additional note: see also D. Fargion (Nuovo Cimento 65,1981,316), L.V. Solov’eva & I.S. Nurgaliev (Sov. Astron. 29(3),1985,267-272), L.V. Solov’eva & A.A. Starobinskiy (Sov. Astron. 29(4),1985,367-371), I.S. Nurgaliev (Sov. Astron. Lett. 12(2),1986,73-76) and compare with astro-ph/9605133.
Source arXiv, astro-ph/9605151
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