Low-redshift constraints on the Hubble constant from the baryon acoustic oscillation "standard rulers" and the gravitational wave "standard sirens"
Low-redshift constraints on the Hubble constant from the baryon acoustic oscillation "standard rulers" and the gravitational wave "standard sirens"
复制标题
重子声振荡“标准标尺”和引力波“标准警报器”对哈勃常数的低红移约束
DOI：
10.1140/epjc/s10052-019-6664-0
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发表时间：
2019
影响因子：
4.4
通讯作者：
Zhao Zhi-Chao
中科院分区：
文献类型：
--
作者：
Chang Zhe;Huang Qing-Guo;Wang Sai;Zhao Zhi-Chao
GW170817的多信使观测表明，哈勃常数()有了新的独立测量。将引力波测量与重子声振荡中距离尺度的观测相结合，我们得到了低红移的宇宙学约束。利用费雪信息矩阵，我们估计了爱因斯坦望远镜的投影约束。通过模拟双中子星合并产生的引力波标准警报，我们发现，在宇宙常数加冷暗物质模型中，单靠爱因斯坦望远镜几乎可以像普朗克最终数据发布一样严格地约束数据发布。通过将爱因斯坦望远镜和暗能量光谱仪结合起来，可以进一步改善这一约束。因此，未来可以通过用爱因斯坦望远镜观测标准警报器来检查哈勃恒定张力。
The multi-messenger observations of GW170817 indicated a new independent measurement of the Hubble constant (). We obtain the low-redshift cosmological constraints onby combining this gravitational wave measurement with the observations of distance scales in baryon acoustic oscillations. Using Fisher information matrix, we estimate the projected constraints onfrom Einstein Telescope. Simulatinggravitational-wave standard sirens from binary neutron star coalescences, we find that Einstein Telescope alone can constrainalmost as tightly as Planck final data release in the cosmological constant plus cold dark matter model. This constraint can be further improved by combining Einstein Telescope with Dark Energy Spectroscopic Instrument. The Hubble constant tension can thus be checked by observing the standard sirens with Einstein Telescope in the future.