A Gravitational-wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo
A Gravitational-wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo
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DOI：
10.3847/1538-4357/abdcb7
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发表时间：
2021-03-01
影响因子：
4.9
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
本文介绍了利用先进LIGO和Virgo探测器网络的第一次和第二次观测运行探测到的引力波测量哈勃常数（H-0）。双星中子星星GW 170817的瞬变电磁对应物的存在导致了H-0的第一个标准警报测量。在这里，我们还使用二元黑洞检测与星系目录相结合，并报告联合测量结果。我们更新的测量值是H-0 = 69（-8）（+16）km s（-1）Mpc（-1）（最高密度后验间隔的68.3%，具有平坦的对数先验），这比仅GW 170817的值69（-8）（+17）km s（-1）Mpc（-1）提高了1.04倍（约4%）。另一个重要的贡献来自GW 170814，这是一个来自暗能量调查完全覆盖的天空部分的响亮而定位良好的探测。由于预计在今后几年中会有大量的探测，对其他系统性影响的详尽了解也将变得越来越重要。这些结果建立了宇宙学的路径，使用引力波观测和没有瞬变电磁对应物。
This paper presents the gravitational-wave measurement of the Hubble constant (H-0) using the detections from the first and second observing runs of the Advanced LIGO and Virgo detector network. The presence of the transient electromagnetic counterpart of the binary neutron star GW170817 led to the first standard-siren measurement of H-0. Here we additionally use binary black hole detections in conjunction with galaxy catalogs and report a joint measurement. Our updated measurement is H-0 = 69(-8)(+16) km s(-1) Mpc(-1) (68.3% of the highest density posterior interval with a flat-in-log prior) which is an improvement by a factor of 1.04 (about 4%) over the GW170817-only value of 69(-8)(+17) km s(-1) Mpc(-1). A significant additional contribution currently comes from GW170814, a loud and well-localized detection from a part of the sky thoroughly covered by the Dark Energy Survey. With numerous detections anticipated over the upcoming years, an exhaustive understanding of other systematic effects are also going to become increasingly important. These results establish the path to cosmology using gravitational-wave observations with and without transient electromagnetic counterparts.