Bulk viscosity driving the acceleration of the Universe

Gen.Rel.Grav.38:495-506,2006 The possibility that the present acceleration of the universe is driven by a kind of viscous fluid is exploited. At background level this model is similar to the generalized Chaplygin gas model (GCGM). But, at perturbative level, the viscous fluid exhibits interesting pr...

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Hauptverfasser:	Fabris, J. C, Goncalves, S. V. B, Ribeiro, R. de Sa
Format:	Artikel
Sprache:	eng
Schlagworte:	Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - General Relativity and Quantum Cosmology Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics
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Zusammenfassung:	Gen.Rel.Grav.38:495-506,2006 The possibility that the present acceleration of the universe is driven by a kind of viscous fluid is exploited. At background level this model is similar to the generalized Chaplygin gas model (GCGM). But, at perturbative level, the viscous fluid exhibits interesting properties. In particular the oscillations in the power spectrum that plagues the GCGM are not present. Possible fundamental descriptions for this viscous dark energy are discussed.
DOI:	10.48550/arxiv.astro-ph/0503362