May 3 – 5, 2023
Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon
Europe/Lisbon timezone

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

May 5, 2023, 12:05 PM
15m
Centro de Congressos (Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon)

Centro de Congressos

Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon

Av. Rovisco Pais 1 1049-001 Lisboa, PORTUGAL

Speaker

Dr Hai-Tian Wang (Peking University)

Description

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 $\sqrt{\alpha_{\rm EdGB}}\leq 0.40{\, \rm km}$ 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.

Primary authors

Dr Hai-Tian Wang (Peking University) Ming-Zhe Han Peng-Cheng Li Shao-Peng Tang Yi-Zhong Fan

Presentation materials