Strong constraints on cosmological gravity from GW170817 and GRB 170817A

Tessa Baker, Emilio Bellini, P. G. Ferreira, M. Lagos, J. Noller, I. Sawicki

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The detection of an electromagnetic counterpart (GRB 170817A) to the gravitational-wave signal (GW170817) from the merger of two neutron stars opens a completely new arena for testing theories of gravity. We show that this measurement allows us to place stringent constraints on general scalar-tensor and vector-tensor theories, while allowing us to place an independent bound on the graviton mass in bimetric theories of gravity. These constraints severely reduce the viable range of cosmological models that have been proposed as alternatives to general relativistic cosmology.
Original languageEnglish
Article number251301
Pages (from-to)1-6
Number of pages6
JournalPhysical Review Letters
Issue number25
Early online date18 Dec 2017
Publication statusPublished - 22 Dec 2017


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