Orbifold techniques are used to study bosonic, type II, and heterotic strings in Rindler space at integer multiples N of the Rindler temperature, and near a black hole horizon at integer multiples of the Hawking temperature, extending earlier results of Dabholkar. It is argued that a Hagedorn transition occurs near the horizon for all N>1.

• Received 31 October 1994

DOI:https://doi.org/10.1103/PhysRevD.51.1793