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 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 +/- 0.29 for the power-law exponent. We calculate for this regime the evolution of density and entropy perturbations.