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arXiv · 2104.07590

Tight constraints on Einstein-dilation-Gauss-Bonnet gravity from GW190412 and GW190814

Hai-Tian Wang·Shao-Peng Tang·Peng-Cheng Li·Ming-Zhe Han·Yi-Zhong Fan
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Abstract

Gravitational-wave (GW) data can be used to test general relativity in the highly nonlinear and strong field regime. Modified gravity theories such as Einstein-dilation-Gauss-Bonnet and dynamical Chern-Simons can be tested with the additional GW signals detected in the first half of the third observing run of Advanced LIGO/Virgo. Specifically, we analyze gravitational-wave data of GW190412 and GW190814 to place constraints on the parameters of these two theories. Our results indicate that dynamical Chern-Simons gravity remains unconstrained. For Einstein-dilation-Gauss-Bonnet gravity, we find $\sqrt{\alpha_{\rm EdGB}}\lesssim 0.40\,\rm km$ when considering GW190814 data, assuming it is a black hole binary. Such a constraint is improved by a factor of approximately $10$ in comparison to that set by the first Gravitational-Wave Transient Catalog events.

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Hai-Tian Wang, Shao-Peng Tang, Peng-Cheng Li, Ming-Zhe Han, Yi-Zhong Fan. 2021-04-15. Tight constraints on Einstein-dilation-Gauss-Bonnet gravity from GW190412 and GW190814. https://doi.org/10.1103/physrevd.104.024015

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