首页|Test of the Brans-Dicke theory with GW200105 and GW200115
Test of the Brans-Dicke theory with GW200105 and GW200115
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We study whether it is possible to constrain the Brans-Dicke(BD)theory from the measurement of gravitational waves(GW)released in neutron star-black hole collisions.Considering the scalar field modifications through monopole and dipole radiations,we find additional contributions to the phase evolution in the emitted gravitational waveform.After effectively calculating such effect in the post-Newtonian order,we are in a position to measure the scalar field and give bounds on the BD coupling parameter ωBD.We derive the analytical expression for the phase modification due to the orbital eccentricity of eccentric binaries in both general relativity and BD theory.Employing the Bayesian analysis,we obtain the constraints on ωBD from the GW events,GW200105 and GW200115.
cosmologyBrans-Dicke theorygravitational wave
Qin Fei、Yingjie Yang
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Department of Mathematics and Physics,School of Biomedical Engineering,Southern Medical University,Guangzhou 510515,China
School of Mathematics and Physics,Hubei Polytechnic University,Huangshi 435003,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Program of Guangzhou
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