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Mock gravity and the cosmic structure
Hogan, Craig J.
AA(Steward Observatory, Tucson, AZ)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 340, May 1, 1989, p. 1-10. Research supported by the Alfred P. Sloan Foundation. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Cosmology, Gravitation Theory, Relic Radiation, Galactic Clusters, Perturbation Theory, Radiation Distribution, Radiation Pressure, Strange Attractors
Bibliographic Code:


The process of generating large-scale cosmic structure from the radiation-pressure or 'mock gravity' instability is studied with particular emphasis on the implications of the Berkeley-Nagoya rocket data for the submillimeter background. The linear theory of perturbations in an absorbing medium embedded in an expanding universe of radiation sources is presented. The instability sets up collapse velocities in linear perturbation theory which far exceed those from gravitational instability, so growth continues even after the instability switches off. Perturbation due to this effect is analyzed and related to the growth of large-scale cosmic structures at recent times; large-scale structure is shown to evolve very little from 1 + z about 5 to the present. Nonlinear small-scale effects of the instability are analyzed; it is shown that radiation pressure would compress gas into small, dense pressure-confined clouds with tau much greater than one.

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arXiv e-prints