Born-Infeld Phantom Gravastars
  We construct new gravitational vacuum star solutions with a Born-Infeld phantom replacing the de Sitter interior. The model allows for a wide range of masses and radii required by phenomenology, and can be motivated from low energy string theory. 
Neven Bilic (1), Gary B. Tupper (2), and Raoul D. Viollier (2) ((1)   Rudjer Boskovic Institute, Zagreb, Croatia, (2) Univer...