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arXiv 2111.02404gr-qcastro-ph.COastro-ph.HE
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用引力透镜探测极低频引力波:一般情况

Detection of extremely low frequency gravitational wave using gravitational lens: The general case

Wenshuai Liu

摘要:

本文研究了极低频引力波对源-偏转器-观测者排列透镜系统中爱因斯坦环上不同位置之间时间延迟的影响。观察者将从高度对称配置的透镜系统观察到爱因斯坦环。如果没有宇宙学波长的引力波通过透镜系统传播,爱因斯坦环上不同位置之间的时间延迟就不会出现。否则,爱因斯坦环上的不同位置将显示时间延迟。我们以前的研究表明,在宇宙学波长的引力波存在下,爱因斯坦环上不同位置的时间延迟呈现出一种特殊的关系。但这一结果仅限于一个特定的源-偏转器-观测器的配置,其中源和观测器是等距的偏转器和引力波有特殊的传播方向和偏振。为了研究一般情况下的性质,本文将其推广到源和观测者与偏转器的距离不相等以及引力波的方向和偏振是任意的一般情况。结果表明,在一般条件下,爱因斯坦环上不同位置之间的时间延迟呈现与我们以前研究相同的关系。

英文摘要:

The effect of gravitational wave of extremely low frequency on time delays between different locations on the Einstein ring in a lens system with an aligned source-deflector-observer configuration is investigated. The observer will observe an Einstein ring from the lens system aligned in a highly symmetric configuration. Time delays between different locations on the Einstein ring cannot emerge without gravitational wave of cosmological wavelength propagating through the lens system. Otherwise, different locations on the Einstein ring will show time delays. Our previous studies showed that time delays from different locations on the Einstein ring in the presence of gravitational wave of cosmological wavelength present a special relationship. But this result is limited to a specific aligned source-deflector-observer configuration where the source and the observer are equidistant from the deflector and the gravitational wave has special direction of propagation and polarization. In order to investigate the property in the general case, we extend to the general condition that the source and the observer aren't equidistant from the deflector and the direction and polarization of the gravitational wave is arbitrary in the present work. Results in this work show that time delays between different locations on the Einstein ring with the general condition present the same relationship as that in our previous studies.

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。

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