Testing the Etherington distance duality relation at higher redshifts: Combined radio quasar and gravitational wave data
Testing the Etherington distance duality relation at higher redshifts: Combined radio quasar and gravitational wave data
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测试较高红移处的埃林顿距离对偶关系：结合射电类星体和引力波数据
DOI：
10.1103/physrevd.99.063507
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发表时间：
2019
影响因子：
5
通讯作者：
Tonghua Liu
中科院分区：
文献类型：
--
作者：
Jing-Zhao Qi;Shuo Cao;Chenfa Zheng;Yu Pan;Zejun Li;Jin Li;Tonghua Liu
本文分析了最新的宇宙学观测数据对检验Etherington距离对偶关系（DDR）的意义，它将光度距离和角直径距离联系在一起，并给出了相应的红移值。其中，第三代引力波探测器（Einstein Telescope，ET）的引力波模拟数据可以看作是标准烛光（或标准塞壬），而角直径距离则是由VLBI观测到的致密射电类星体的新样本导出的，它代表了一种新型的宇宙学标准标尺。减轻宇宙中尘埃的吸收和散射效应，这将创造一个宝贵的机会，利用引力波（GW）和电磁（EM）信号的组合以更高的精度直接测试DDR。结果表明，结合现有射电类星体的观测资料，对偶距离关系的验证精度可以达到。此外，爱因斯坦望远镜将对这种距离对偶关系的有效性产生更强大的约束（精度为），在未来的VLBI调查中检测到更大的紧凑毫弧秒射电类星体样本。
In this paper, we analyze the implications of the latest cosmological data sets to test the Etherington distance duality relation (DDR), which connects the luminosity distanceand angular diameter distanceat the same redshift. For, we consider the simulated data of gravitational waves from the third-generation gravitational wave detector [the Einstein Telescope (ET)], which can be considered as standard candles (or standard siren), while the angular diameter distancesare derived from the newly compiled sample of compact radio quasars observed by very-long-baseline interferometry (VLBI), which represents a new type of cosmological standard ruler. Alleviating the absorbtion and scattering effects of dust in the Universe, this will create a valuable opportunity to directly test DDR at much higher precision with the combination of gravitational wave (GW) and electromagnetic (EM) signals. Our results show that, with the combination of the current radio quasar observations, the duality-distance relation can be verified at the precision of. Moreover, the Einstein Telescope would produce more robust constraints on the validity of such distance duality relation (at the precision of), with a larger sample of compact milliarcsecond radio quasars detected in future VLBI surveys.