4.8 Article

Strong Constraints on Cosmological Gravity from GW170817 and GRB 170817A

Journal

PHYSICAL REVIEW LETTERS
Volume 119, Issue 25, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.251301

Keywords

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Funding

  1. ERC
  2. BIPAC
  3. STFC
  4. Higgs Centre at the University of Edinburgh
  5. University of Chicago by the Kavli Institute for Cosmological Physics through an endowment from the Kavli Foundation
  6. Walter Haefner Foundation
  7. ETH Zurich Foundation
  8. ESIF
  9. MEYS [CoGraDS-CZ.02.1.01/0.0/0.0/15_003/0000437]
  10. All Souls College, University of Oxford
  11. STFC [ST/N000919/1] Funding Source: UKRI

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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.

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