Precision cosmology from future lensed gravitational wave and electromagnetic signals.

Precision cosmology from future lensed gravitational wave and electromagnetic signals.
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来自未来透镜引力波和电磁信号的精确宇宙学

DOI:
10.1038/s41467-017-01152-9
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发表时间:
2017-10-27
影响因子:
16.6
通讯作者:
Zhu ZH
Zhu ZH
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Liao K;Fan XL;Ding X;Biesiada M;Zhu ZH

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引力波宇宙学的标准警笛方法呼吁通过吸入双紧双星的波形信号直接估计光度距离,特别是那些具有电磁对偶的红移。该方法受应变幅值标定不确定性的限制,且依赖于波形的精细细节。爱因斯坦望远镜预计每年能探测到104-105次引力波,其中50-100次将使用透镜。在这里,我们报告了一种波形无关的策略,通过将强透镜引力波信号精确测量的时间延迟与电磁域中观察到的图像和红移相结合,来实现精确的宇宙学。我们证明,在第三代地面探测器时代,只有10个这样的系统可以为平坦λ冷暗物质宇宙提供0.68%的哈勃常数不确定性。引力波源可以通过直接的距离光度关系作为宇宙探测器。在这里,作者证明了透镜引力波信号和电磁引力波信号之间的时间延迟可以减少哈勃常数的不确定性。
The standard siren approach of gravitational wave cosmology appeals to the direct luminosity distance estimation through the waveform signals from inspiralling double compact binaries, especially those with electromagnetic counterparts providing redshifts. It is limited by the calibration uncertainties in strain amplitude and relies on the fine details of the waveform. The Einstein telescope is expected to produce 104–105 gravitational wave detections per year, 50–100 of which will be lensed. Here, we report a waveform-independent strategy to achieve precise cosmography by combining the accurately measured time delays from strongly lensed gravitational wave signals with the images and redshifts observed in the electromagnetic domain. We demonstrate that just 10 such systems can provide a Hubble constant uncertainty of 0.68% for a flat lambda cold dark matter universe in the era of third-generation ground-based detectors. Gravitational wave sources can be used as cosmological probes through a direct distance luminosity relation. Here, the authors demonstrate that the time delay between lensed gravitational wave signals and their electromagnetic counterparts can reduce the uncertainty in the Hubble constant.
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