Classical and Quantum Gravity vol:24 issue:8 pages:2139-2151
We construct exact cosmological scaling solutions in N = 8 gauged supergravity. We restrict to solutions for which the scalar fields trace out geodesic curves on the scalar manifold. Under these restrictions it is shown that the axionic scalars are necessarily constant. The potential is then a sum of exponentials and has a very specific form that allows for scaling solutions. The scaling solutions describe eternal accelerating and decelerating power-law universes, which are unstable. An uplift of the solutions to 11-dimensional supergravity is carried out and the resulting time-dependent geometries are discussed. In the discussion we briefly comment on the fact that N = 2 gauged supergravity allows accelerating stable scaling solutions.