Post-Newtonian binary dynamics in the effective field theory of Horndeski gravity* * Supported by National Key Research and Development Program of China (2021YFC2201901) and National Natural Science Foundation of China (12147103, 11851302)
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引用次数: 0
Abstract
General relativity has been very successful since its proposal more than a century ago. However, various cosmological observations and theoretical consistency still motivate us to explore extended gravity theories. Horndeski gravity stands out as one attractive theory by introducing only one scalar field. Here we formulate the post-Newtonian effective field theory of Horndeski gravity and investigate the conservative dynamics of inspiral compact binary systems. We calculate the leading effective Lagrangian for a compact binary and obtain the periastron advance per period. In particular, we apply our analytical calculation to two binary systems, PSR B 1534+12 and PSR J0737-3039, and constrain the relevant model parameters. This theoretical framework can also be systematically extended to higher orders.
广义相对论自一个多世纪前提出以来一直非常成功。然而，各种宇宙学观测结果和理论一致性仍然促使我们探索扩展引力理论。霍恩德斯基引力只引入了一个标量场，是一种极具吸引力的理论。在这里，我们提出了霍恩德斯基引力的后牛顿有效场理论，并研究了吸积紧凑双星系统的保守动力学。我们计算了紧凑双星的前导有效拉格朗日，并得到了每个周期的周天推进量。特别是，我们将分析计算应用于两个双星系统--PSR B 1534+12 和 PSR J0737-3039，并约束了相关的模型参数。这一理论框架还可以系统地扩展到更高阶。
期刊介绍：
Chinese Physics C covers the latest developments and achievements in the theory, experiment and applications of:
Particle physics;
Nuclear physics;
Particle and nuclear astrophysics;
Cosmology;
Accelerator physics.
The journal publishes original research papers, letters and reviews. The Letters section covers short reports on the latest important scientific results, published as quickly as possible. Such breakthrough research articles are a high priority for publication.
The Editorial Board is composed of about fifty distinguished physicists, who are responsible for the review of submitted papers and who ensure the scientific quality of the journal.
The journal has been awarded the Chinese Academy of Sciences ‘Excellent Journal’ award multiple times, and is recognized as one of China''s top one hundred key scientific periodicals by the General Administration of News and Publications.
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