Constraint on Brans-Dicke theory from intermediate/extreme mass ratio inspirals

被引：7
作者：
Jiang, Tong [1 ]
Dai, Ning [1 ]
Gong, Yungui [1 ]
Liang, Dicong [2 ]
Zhang, Chao [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Phys, 1037 LuoYu Rd, Wuhan 430074, Hubei, Peoples R China
[2] Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2022年 / 12期
基金：
中国博士后科学基金;
关键词：
Gravitational waves in GR and beyond; theory; gravitational waves; modified gravity; GRAVITATIONAL-WAVE OBSERVATIONS; BLACK-HOLE; RADIATION REACTION; GENERAL-RELATIVITY; BINARY-SYSTEMS; MACHS PRINCIPLE; SELF-FORCE; GRAVITY; LISA; PERTURBATIONS;
D O I：
10.1088/1475-7516/2022/12/023
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Intermediate/Extreme mass ratio inspiral (I/EMRI) system provides a good tool to test the nature of gravity in strong field. Based on the method of osculating orbits, we compute the orbital evolutions of I/EMRIs on quasi-elliptic orbits in both Einstein's general relativity and Brans-Dicke theory. The extra monopolar and dipolar channels in Brans-Dicke theory accelerate the orbital decay, so it is important to consider the effects of monopolar and dipolar emissions on the waveform. With the help of accurate orbital motion, we generate waveform templates which include both monopolar and dipolar contributions for I/EMRIs on eccentric orbits in Brans-Dicke theory. With a two-year observation of gravitational waves emitted from I/EMRIs by LISA, we get the most stringent constraint on the Brans-Dicke coupling parameter w0 > 106.
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页数：28
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