Are cosmic strings gravitationally stable topological defects?
The authors present an exact solution of the vacuum Einstein equations, obtained by matching two Minkowski spacetimes which can be interpreted as an outgoing gravitational wave due to the splitting of a cosmic string.
Publication Source (Journal or Book title)
Classical and Quantum Gravity
Gleiser, R., & Pullin, J. (1989). Are cosmic strings gravitationally stable topological defects?. Classical and Quantum Gravity, 6 (8) https://doi.org/10.1088/0264-9381/6/8/005