EINSTEIN-MAXWELL BREATHERS

We present a family of exact solutions of the Einstein-Maxwell equatio ns, obtained from a Bianchi-type VI0 vacuum seed metric using Alekseev 's inverse scattering method, which generalizes the 'breather-like' va cuum solution recently obtained by Belinsky. We show that, for a range of values of two of the parameters characterizing this family, the sp acetimes represent two electrogravitational plane waves emanating from an initial singularity, near which the 'breather-like' behaviour is d isplayed, and which afterwards propagate along the cosmological Bianch i VI0 background. We also present plots of several physically relevant quantities, where this behaviour of the spacetimes is graphically dep icted.