标题： GW170817 和 GRB 170817A 对宇宙引力的强约束 显示英文标题

标题： Strong constraints on cosmological gravity from GW170817 and GRB 170817A

摘要： 双中子星并合产生的引力波信号（GW170817）及其电磁对应体（GRB 170817A）的探测为检验引力理论开辟了全新的领域。 我们表明，这一测量能够对广义标量-张量和矢量-张量理论施加严格的限制，同时允许我们在双度量引力理论中独立约束引力子的质量。 这些限制极大地缩小了作为广义相对论宇宙学替代方案提出的宇宙学模型的可行范围。 显示英文摘要

摘要： 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.