论文标题
对引力波中潮汐效应的全面分析及其对宇宙学的影响
Comprehensive analysis of the tidal effect in gravitational waves and implication for cosmology
论文作者
论文摘要
紧凑型二进制组合产生的重力波（GWS）的检测提供了一种新颖的方法来测量GW事件的光度距离。结合红移，它们可以作为标准警报器来限制宇宙学参数。对于第二代（2G），2.5G和3G中的各种GW检测器网络，我们全面分析了约束二进制中子星（BNSS）状态方程（EOS）的方法，并通过GW波形中的潮汐效应提取其红移。我们发现，对于这些事件，低红移范围内电磁对应物的观察对于限制潮汐效应很重要。考虑到NSS或Quark明星的17种不同的EOSS，我们发现GW观察结果具有很强的确定EOS的能力。将事件作为标准警报器应用，并考虑到先验的NS EOS的约束，我们可以约束深色能量EOS参数$ W_0 $和$ W_A $。在3G时代，潜在限制为$ΔW_0\ in（0.0006,0.004）$和$ΔW_A\ in（0.004,0.02）$，其比传统方法小的1-3订单小1-3个订单，包括IA型超新星和BARYON ASOTOCTIC EACTOCTOCTOCTOCTOCTICS振荡。由于此方法中更多可用的GW事件，通过将红移固定在短速度$γ$ ray爆发中，约束也比GW标准警报器的方法小1个。因此，基于潮汐效应的测量，GW标准警报器在宇宙学方面提供了可实现的功能更强大的工具。
Detection of gravitational waves (GWs) produced by coalescence of compact binaries provides a novel way to measure the luminosity distance of GW events. Combining their redshift, they can act as standard sirens to constrain cosmological parameters. For various GW detector networks in 2nd-generation (2G), 2.5G and 3G, we comprehensively analyze the method to constrain the equation-of-state (EOS) of binary neutron-stars (BNSs) and extract their redshifts through the imprints of tidal effects in GW waveforms. We find for these events, the observations of electromagnetic counterparts in low-redshift range $z < 0.1$ are important for constraining the tidal effects. Considering 17 different EOSs of NSs or quark-stars, we find GW observations have strong capability to determine the EOS. Applying the events as standard sirens, and considering the constraints of NS's EOS derived from low-redshift observations as prior, we can constrain the dark-energy EOS parameters $w_0$ and $w_a$. In 3G era, the potential constraints are $Δw_0\in (0.0006,0.004)$ and $Δw_a\in(0.004,0.02)$, which are 1-3 orders smaller than those from traditional methods, including Type Ia supernovas and baryon acoustic oscillations. The constraints are also 1 order smaller than the method of GW standard siren by fixing the redshifts through short-hard $γ$-ray bursts, due to more available GW events in this method. Therefore, GW standard sirens, based on the tidal effect measurement, provide a realizable and much more powerful tool in cosmology.
