论文标题
使用重力波暗警报器和中子潮汐变形测量哈勃常数和深色能量的前景
Prospects for measuring the Hubble constant and dark energy using gravitational-wave dark sirens with neutron star tidal deformation
论文作者
论文摘要
使用在二元中子星（BNS）融合中潮汐变形的测量值可以获得引力波（GW）源红移的信息，因此实际上可以使用这种GW黑暗架子来研究宇宙扩张历史。为此，关键是要获取大量准确的GW数据，这可以通过第三代（3G）GW检测器来实现。在这里，我们希望回答一个问题，即是否可以仅使用GW黑暗警报器精确测量黑暗能量的哈勃常数和状态方程（EOS）。我们发现，在3G GW检测器的时代，$ {\ cal o}（10^5-10^6）$暗警笛数据（带有NS潮汐测量值），如果NS的EOS的EOS是广为人知的，并且仅使用黑暗的Sirens实际上可以实现精确的自由学。根据3G检测器的网络，我们获得了限制性精度为$ 0.15 \％$和$ 0.95 \％$ $ $，分别为Hubble Consance $ H_0 $和Dark Energy $ W $的常数EOS；对于黑暗能源的两参数EOS参数化，$ W_0 $的精度为$ 2.04 \％$，$ W_A $的误差为0.13。我们得出的结论是，只要NS的EOS是完全众所周知的，3G GW检测器将导致解决哈勃张力的突破并揭示暗能量的性质。
Using the measurements of tidal deformation in the binary neutron star (BNS) coalescences can obtain the information of redshifts of gravitational wave (GW) sources, and thus actually the cosmic expansion history can be investigated using solely such GW dark sirens. To do this, the key is to get a large number of accurate GW data, which can be achieved with the third-generation (3G) GW detectors. Here we wish to offer an answer to the question of whether the Hubble constant and the equation of state (EoS) of dark energy can be precisely measured using solely GW dark sirens. We find that in the era of 3G GW detectors ${\cal O}(10^5-10^6)$ dark siren data (with the NS tidal measurements) could be obtained in three-year observation if the EoS of NS is perfectly known, and thus using only dark sirens can actually achieve the precision cosmology. Based on a network of 3G detectors, we obtain the constraint precisions of $0.15\%$ and $0.95\%$ for the Hubble constant $H_0$ and the constant EoS of dark energy $w$, respectively; for a two-parameter EoS parametrization of dark energy, the precision of $w_0$ is $2.04\%$ and the error of $w_a$ is 0.13. We conclude that 3G GW detectors would lead to breakthroughs in solving the Hubble tension and revealing the nature of dark energy provided that the EoS of NS is perfectly known.
