arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1809.00474gr-qc
收藏

用强透镜引力波测试精细结构常数的变化

Testing the variation of the fine structure constant with strongly lensed gravitational waves

Xin Li, Li Tang, Hai-Nan Lin, Li-Li Wang

摘要:

电磁精细结构常数$α_e$在宇宙尺度上的可能变化引起了人们的极大兴趣。强透镜引力波和电磁波可以用来测试这种变化。在假设光子的速度可以改变,而GW的速度与GR预言的相同,并且它们都在平坦的Friedman-Robertson-Walker宇宙中传播的情况下,我们研究了图像的时间延迟的差异,并导出了$α_e$变化的上界。对于标准宇宙学模型中的一个典型透镜系统,我们得到了$B\cosθ\leq 1.85\times10^{-5}$,其中$B$是偶极振幅,$θ$是观测方向与优选方向的夹角。我们的结果是一致的最新观测$α_e$。此外,强透镜引力波和电磁波的观测可以用来检验哪种类型的引力理论可以解释$α_e$的变化。

英文摘要:

The possible variation of the electromagnetic fine structure constant $α_e$ on cosmological scales arouses great interests in recent years. The strongly lensed gravitational waves and the electromagnetic counterparts could be used to test this variation. Under the assumption that the speed of photon could be modified, while the speed of GW is the same as GR predicated, and they both propagate in a flat Friedman-Robertson-Walker universe, we investigate the difference of time delays of the images and derive the upper bound of the variation of $α_e$. For a typical lensing system in the standard cosmological models, we obtain $B\cosθ\leq 1.85\times10^{-5}$, where $B$ is the dipolar amplitude and $θ$ is the angle between observation and the preferred direction. Our result is consistent with the most up-to-date observations on $α_e$. In addition, the observations of strongly lensed gravitational waves and the electromagnetic counterparts could be used to test which types of alternative theories of gravity can account for the variation of $α_e$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑