NEW EXACT VACUUM SOLUTIONS IN BRANS-DICKE THEORY

A family of exact solutions to vacuum Brans-Dicke theory with spherica l symmetry is found. In the limit of large omega this family reduces t o the solutions obtained in general relativity with a scalar field. Th e solutions show curvature singularities for all times, therefore they do not represent the gravitational collapse of a physical system with regular initial data in the theory One would like to interpret it as an inhomogeneous dynamical cosmology, but the lack of a regular spacel ike slice forbids it. For a special Value of an integration constant w e have an isotropic cosmological model without the problems mentioned above.