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Quintessence dissipative superattractor cosmology

Authors
  • Chimento, Luis P.
  • Jakubi, Alejandro S.
  • Zuccala, Norberto A.
Type
Published Article
Publication Date
Apr 17, 2001
Submission Date
Jan 30, 2001
Identifiers
DOI: 10.1103/PhysRevD.63.103508
arXiv ID: astro-ph/0101549
Source
arXiv
License
Unknown
External links

Abstract

We investigate the simplest quintessence dissipative dark matter attractor cosmology characterized by a constant quintessence baryotropic index and a power--law expansion. We show a class of accelerated coincidence--solving attractor solutions converging to this asymptotic behavior. Despite its simplicity, such a ``superattractor'' regime provides a model of the recent universe that also exhibits an excellent fit to supernovae luminosity observations and no age conflict. Our best fit gives $\alpha=1.71\pm 0.29$ for the power-law exponent. We calculate for this regime the evolution of density and entropy perturbations.

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