GW170817与标准汽笛宇宙学

GW170817 and standard siren cosmology

GW170817实现了基于“标准汽笛”的首次哈勃常数H0测量,开启了标准汽笛宇宙学的序幕。正在进行的双中子星并合引力波观测,有望在5年内测量H0到约2%精度,提供解决H0危机的独立而珍贵的数据。下一代的引力波实验,则将通过标准汽笛方法,精确测量宇宙膨胀速度和宇宙大尺度结构,限制暗能量状态方程,在宇宙学尺度上检验广义相对论。

The observation of G W 170817 realized the first H0 measurement through the standard siren method, and initiated the era of standard siren cosmology. O ngoing gravitational wave observations of binary neutron star mergers are expected to measure H0 within 2 % accuracy in five years time, and to provide independent data to solve the H0 tension. The third generation experiments will be able to accurately measure the expansion and structure growth rate of the universe over a wide redshift range, put stringent constraints on the nature of dark energy, and test general relativity on a cosmological scale.