BORN-INFELD-DE SITTER GRAVITY: COLD, ULTRA-COLD AND NARIAI BLACK HOLES

In this paper, we have presented interesting properties of the static charged Born-Infeld-de Sitter black hole. They can have timelike as well as spacelike singularities depending on the parameters of the theory. The degenerate black holes lead to cold, ultra-cold and Nariai black holes. The geometry of such black holes is discussed. A comparison is done with the Reissner-Nordstrom-de Sitter black holes.