The evolution of gravitational instabilities - Amplification by coupling of perturbation modes

Details The evolution of gravitational instabilities - Amplification by coupling of perturbation modes The evolution of gravitational instabilities - Amplification by coupling of perturbation modes

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.159..295h&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 159, no. 2, Sept. 1989, p. 295-300.

Statistics

Computation

Evolution (Development), Gravitational Effects, Perturbation Theory, Universe, Computational Astrophysics, Cosmology, Coupled Modes, Equations Of State, Galactic Nuclei

Scientific paper

A new mechanism which could explain some of the problems of structure formation in the universe is proposed. The coupling of perturbation modes amplifies gravitational instability and favors Population III stars as the first objects condensed during cosmological evolution. This result is obtained in the framework of a Jeans treatment extended to nonlinear order of perturbation evolution in an expanding Einstein-de Sitter background universe and assuming after recombination large-scale perturbations of about 0.00001 in the cosmological fluid characterized by the equation of state where P is about rho exp 5/3.

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