Gravitational wave memory: A new approach to study modified gravity

  title={Gravitational wave memory: A new approach to study modified gravity},
  author={Song Ming Du and Atsushi J. Nishizawa},
  journal={Physical Review D},
It is well known that two types of gravitational wave memory exist in general relativity (GR): the linear memory and the nonlinear, or Christodoulou, memory. These effects, especially the latter, depend on the specific form of the Einstein equation. It can then be speculated that, in modified theories of gravity, the memory can differ from the GR prediction and provides novel phenomena to study these theories. We support this speculation by considering scalar-tensor theories, for which we find… 

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