SOLITON-INDUCED SINGULARITIES IN 2D GRAVITY AND THEIR EVAPORATION

Positive energy singularities induced by Sine-Gordon solitons in (1+1) -dimensional dilaton gravity with positive and negative cosmological c onstant are considered. When the cosmological constant is positive, th e singularities combine a white hole, a timelike singularity and a bla ck hole joined smoothly near the soliton centre. When the cosmological constant is negative, the solutions describe two timelike singulariti es joined smoothly near the soliton centre. We describe these spacetim es and examine their evaporation in one-loop approximation.