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J, Zhu X J, Zimmerman A B, Zucker M E, Zweizig J
LIGO, California Institute of Technology, Pasadena, California 91125, USA.
Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Phys Rev Lett. 2019 Jul 3;123(1):011102. doi: 10.1103/PhysRevLett.123.011102.
The recent discovery by Advanced LIGO and Advanced Virgo of a gravitational wave signal from a binary neutron star inspiral has enabled tests of general relativity (GR) with this new type of source. This source, for the first time, permits tests of strong-field dynamics of compact binaries in the presence of matter. In this Letter, we place constraints on the dipole radiation and possible deviations from GR in the post-Newtonian coefficients that govern the inspiral regime. Bounds on modified dispersion of gravitational waves are obtained; in combination with information from the observed electromagnetic counterpart we can also constrain effects due to large extra dimensions. Finally, the polarization content of the gravitational wave signal is studied. The results of all tests performed here show good agreement with GR.
先进激光干涉引力波天文台（Advanced LIGO）和先进处女座引力波探测器（Advanced Virgo）最近发现了来自双中子星合并的引力波信号，这使得利用这种新型源对广义相对论（GR）进行测试成为可能。这种源首次允许在存在物质的情况下对致密双星的强场动力学进行测试。在本信函中，我们对在描述合并阶段的后牛顿系数中的偶极辐射以及与广义相对论可能的偏差施加了限制。获得了引力波修正色散的界限；结合来自观测到的电磁对应体的信息，我们还可以限制由于大额外维度引起的效应。最后，研究了引力波信号的偏振内容。这里进行的所有测试结果都与广义相对论显示出良好的一致性。
