Nonlinear evolution of dark matter and dark energy in the Chaplygin-gas cosmology

Abstract

The hypothesis that dark matter and dark energy are unified through the Chaplygin gas is reexamined. Using generalizations of the spherical model which incorporate effects of the acoustic horizon we show that an initially perturbative Chaplygin gas evolves into a mixed system containing cold dark matter-like gravitational condensate.

11 pages, 3 figures, substantial revision, title changed, content changed, added references, to appear in JCAP

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Cited by in corpus (39)

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• Interacting Chaplygin gas
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• Stability properties of some perfect fluid cosmological models
• Constraints on dissipative unified dark matter
• Non-adiabatic dark fluid cosmology
• Clarifying spherical collapse in coupled dark energy cosmologies
• Generalized Chaplygin Gas Models tested with SNIa
• Shear and rotation in Chaplygin cosmology
• Challenges for Kinetic Unified Dark Matter
• Nonlinear Chaplygin Gas Cosmologies
• Cosmological tachyon condensation
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