Exact solutions for the interacting tachyonic-dark matter system
arXiv:astro-ph/0404086 · doi:10.1023/B:GERG.0000038630.55301.ca
Abstract
We find exact solutions leading to power law accelerated expansion for a homogeneous, isotropic and spatially flat universe, dominated by an interacting mixture of cold dark matter and a tachyonic field such that the ratio of the energy densities of both components at late times is constant and no coincidence problem arises.
11 pages, no figues, to be published in Gen. Ralativ. Grav