On the Problems of Hazardous Matter and Radiation at Faster than Light   Speeds in the Warp Drive Space-Time
  The problems of hazardous radiation and collisions with matter on a warp driven ship pose considerable obstacles to this possibility for interstellar travel. A solution to these problems lies in the Broeck metric. It is demonstrated that both threats to the ship will be greatly reduced. It is also shown that the horizon problem no longer exists. 
C.B. Hart, R. Held, P.K. Hoiland, S. Jenks, F. Loup, D. Martins, J.   Nyman, J.P. Pertierra, P.A. Santos, M.A. Shore, R. Sim...