Astrophysics and Space Science

, Volume 111, Issue 1, pp 171–178 | Cite as

Density perturbations in a two-fluid component Universe

  • Xiang Shouping


In a two-fluid component universe consisting of visible matter and neutrinos, the developed features of perturbations in the two components are quite different. If the densities ρ1 and ρ2, and the Jeans lengths λ1J and λ2J of the two components satisfy the relations ρ1≪ρ2, λ1J≪λ2J, the developed inhomogeneities in the non-dominant component 1 are larger than those in the dominant component 2. Moreover, the increase of perturbations is in some situations not monotonous but oscillatory, and such oscillations in the two components are contrary.


Dominant Component Density Perturbation Develop Feature Visible Matter Component Universe 
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Copyright information

© D. Reidel Publishing Company 1985

Authors and Affiliations

  • Xiang Shouping
    • 1
  1. 1.Centre for AstrophysicsUniversity of Science and Technology of ChinaHefei, AnhuiChina

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