论文标题

与爱关系的突破性不良变性:通过普遍关系改善重力波测量

Breaking bad degeneracies with Love relations: Improving gravitational-wave measurements through universal relations

论文作者

Xie, Yiqi, Chatterjee, Deep, Holder, Gilbert, Holz, Daniel E., Perkins, Scott, Yagi, Kent, Yunes, Nicolás

论文摘要

距离式融合限制了紧凑型二进制合并的重力波参数估计。尽管通过包括高阶模式或进动的方式可以部分打破堕落性,但这些效果在二进制中子星中抑制。在这项工作中,我们在二进制中子星波形中实施了潮汐效应的新参数化,从而利用了二进制恋爱关系,从而破坏了距离的交换性。二进制恋爱关系规定了中子星在状态不敏感的方式中的潮汐变形性作为其源框架质量的函数,因此可以直接测量源的红移。如果假定宇宙学参数已知,则可以将红移转换为亮度距离,因此可以断开距离融合的脱落性。我们实施了这种新方法,研究了一系列二进制中子明星,使用贝叶斯参数估计合成数据观察场景。在第三代探测器的时代,对于6到167的信噪比的观察,我们预测$ \ sim70 \%$ $ $降低了$ 90 \%$ $ $ $ \ sim50 \ sim50 \ sim50 \%$ $ \%$ $ $ \%$ $ $ \%$ $ $ \%$ $ \%。对于边缘系统,我们的方法可以在距离和倾斜度的测量值和倾斜度的改进中,其二进制距离的距离和倾斜度低至10。可以使用该处方来更好地推断出源构成群众,从而更好地推断出中性星星的优化元素群体,例如最大的核源质量,影响其最大的核元素,影响到最大的核量,影响。当与搜索电磁对应物观察的搜索结合使用时,这里提供的工作可用于将改进的边界放在二进制中子星级合并的喷气机的开头。

The distance-inclination degeneracy limits gravitational-wave parameter estimation of compact binary mergers. Although the degeneracy can be partially broken by including higher-order modes or precession, these effects are suppressed in binary neutron stars. In this work, we implement a new parametrization of the tidal effects in the binary neutron-star waveform, exploiting the binary Love relations, that breaks the distance-inclination degeneracy. The binary Love relations prescribe the tidal deformability of a neutron star as a function of its source-frame mass in an equation-of-state insensitive way and, thus, allows direct measurement of the redshift of the source. If the cosmological parameters are assumed to be known, the redshift can be converted to a luminosity distance, and the distance-inclination degeneracy can thus be broken. We implement this new approach, studying a range of binary neutron-star observing scenarios using Bayesian parameter estimation on synthetic data. In the era of the third-generation detectors, for observations with signal-to-noise ratios ranging from 6 to 167, we forecast up to an $\sim70\%$ decrease in the $90\%$ credible interval of the distance and inclination and up to an $\sim50\%$ decrease in that of the source-frame component masses. For edge-on systems, our approach can result in moderate ($\sim50\%$) improvement in the measurements of distance and inclination for binaries with a signal-to-noise ratio as low as 10. This prescription can be used to better infer the source-frame masses and, hence, refine population properties of neutron stars, such as their maximum mass, impacting nuclear astrophysics. When combined with the search for electromagnetic counterpart observations, the work presented here can be used to put improved bounds on the opening angle of jets from binary neutron-star mergers.

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