Quintessence dissipative superattractor cosmology

We investigate the simplest quintessence dissipative dark matter attractor cosmology characterized by a constant quintessence baryotropic index and a power-law expansion. We show that a class of accelerated coincidence--solving attractor solutions converge into this asymptotic behavior. Despite of its simplicity, such ``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 fluctuations.