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

Neven Bilić1,4, Robert J Lindebaum2, Gary B Tupper3 and Raoul D Viollier3

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The hypothesis that dark matter and dark energy are unified through the Chaplygin gas, an exotic fluid obeying p = −A/ρ, is re-examined. 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.


Keywords

dark matter

cosmology of theories beyond the SM

dark energy theory

PACS

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

04.50.-h Higher-dimensional gravity and other theories of gravity

95.30.Sf Relativity and gravitation

95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)

Subjects

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 11 (November 2004)

Received 27 August 2004, accepted for publication 3 November 2004

Published 12 November 2004



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