Baker T, Bellini E, Ferreira P G, Lagos M, Noller J, Sawicki I
University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom.
Kavli Institue for Cosmological Physics, The University of Chicago, Chicago, Illinois 60637, USA.
Phys Rev Lett. 2017 Dec 22;119(25):251301. doi: 10.1103/PhysRevLett.119.251301. Epub 2017 Dec 18.
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.
对两颗中子星合并产生的引力波信号（GW170817）的电磁对应体（GRB 170817A）的探测为检验引力理论开辟了一个全新的领域。我们表明，这一测量使我们能够对一般标量-张量理论和矢量-张量理论施加严格的限制，同时使我们能够在双度规引力理论中对引力子质量施加独立的限制。这些限制极大地缩小了作为广义相对论宇宙学替代方案而提出的宇宙学模型的可行范围。
