Gravitational radiation of cosmic string loops

We discuss gravitational radiation of cosmic string loops in flat background. After presenting a general formula for the gravitational angular momentum radiation of localized periodic sources, we calculate the radiation of energy, momentum and angular momentum for some classes of loop configurations (one with cusps and another without cusps but with kinks). We find that the angular momentum radiated always points opposite to the angular momentum of the string itself. Finally we investigate some cosmological consequences of our results