Beltrán Jiménez Jose, Piazza Federico, Velten Hermano
CPT, Aix Marseille Université, UMR 7332, 13288 Marseille, France.
Phys Rev Lett. 2016 Feb 12;116(6):061101. doi: 10.1103/PhysRevLett.116.061101. Epub 2016 Feb 9.
By using observations of the Hulse-Taylor pulsar, we constrain the gravitational wave (GW) speed to the level of 10(-2). We apply this result to scalar-tensor theories that generalize Galileon 4 and 5 models, which display anomalous propagation speed and coupling to matter for GWs. We argue that this effect survives conventional screening due to the persistence of a scalar field gradient inside virialized overdensities, which effectively "pierces" the Vainshtein screening. In specific branches of solutions, our result allows us to directly constrain the cosmological couplings in the effective field theory of dark energy formalism.
通过利用对脉冲双星PSR B1913+16的观测，我们将引力波（GW）速度限制在10^(-2)的水平。我们将此结果应用于推广伽利略子4和5模型的标量-张量理论，这些理论显示出引力波的反常传播速度和与物质的耦合。我们认为，由于在处于维里化过密度区域内标量场梯度的持续存在，这种效应在传统屏蔽中仍然存在，这有效地“穿透”了瓦因施泰因屏蔽。在特定的解分支中，我们的结果使我们能够直接限制暗能量形式有效场论中的宇宙学耦合。
