Quintessence dissipative superattractor cosmology - art. no. 103508

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 att ractor solutions converging to this asymptotic behavior. Despite its simpli city, such a ''superattractor'' regime provides a model of the recent unive rse that also exhibits an excellent fit to supernovae luminosity observatio ns and no age conflict. Our best fit gives alpha = 1.71 +/- 0.29 for the po wer-law exponent. We calculate for this regime the evolution of density and entropy perturbations.