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Gravitational radiation in the field of a supermassive cosmic string

The gravitational radiation emitted by a point particle freely moving in the spacetime of a straight supermassive ( 1/8 <G mu < 1/4 ) cosmic string as a model example of manifestation of the gravitational radiative Aharonov-Bohm effect is calculated. The explicit expressions for the spectrum and total radiated energy are obtained. The non-relativistic and relativistic limits of motion are considered.