Kantowski-Sachs string cosmologies

We present new exact solutions of the low-energy-effective-action string equations with both dilaton phi and axion H fields nonzero. The background universe is Kantowski-Sachs-type. We consider the possibility of a pseudoscalar axion field h [H=e(phi)(dh)*] that can be either time or space dependent. The case of a time-dependent h reduces to that of a stiff perfect-fluid cosmology. For a space-dependent h there is just one nonzero time-space-space component of the axion field H, and this corresponds to a distinguished direction in space which prevents the models from isotropizing. Also, in the latter case, both the axion field H and its tensor potential B (H=dB) are dependent on time and space, yet the energy-momentum tensor remains time dependent as required by the homogeneity of the cosmological model.