Black holes in string-generated gravity models

Spherically symmetric solutions of d-dimensional Einstein-Maxwell theory with a Gauss-Bonnet term are classified. All spherically symmetric solutions of d-dimensional Einstein gravity coupled to the Gauss-Bonnet and Born-Infeld terms are derived, classified and compared with the previous solutions. Thermodynamic properties of the black holes are discussed and the black hole temperatures derived. Unlike the solutions of the Einstein-Maxwell theory the solutions with a Born-Infeld term do not appear to have a stable endpoint with regard to thermal evaporation. (author). 63 refs, 3 figs, 1 tab