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arXiv 1906.08982astro-ph.HEgr-qc
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爱的总和:探索中子星的有效潮汐变形能力

The sum of Love: Exploring the effective tidal deformability of neutron stars

N. Andersson, P. Pnigouras

摘要:

在中子星双星螺旋上升的后期,有限尺寸效应开始发挥作用,核上密度物质的潮汐变形能力在引力波信号上留下了印记。正如在GW 170817的例子中所证明的那样,这导致了对中子星半径的约束(从而也导致了状态方程)。更深入地了解潮汐响应需要分析物质的状态和组成。虽然这些方面可能不会产生巨大的影响,但随着观测数据变得更加精确,它们可能会导致系统性影响,需要牢记这一点。作为朝着这个方向迈出的一步,我们探讨了物质组成的作用,这可能是保持“冻结”在双螺旋的后期阶段。我们提供了第一次深入分析的问题,包括如何组成的有效潮汐变形能力的影响估计。这些结果提供了更好的洞察力,了解那些往往被“忽视”的物理学方面如何影响双星中子星引力波信号。

英文摘要:

Finite size effects come into play during the late stages of neutron star binary inspiral, with the tidal deformability of the supranuclear density matter leaving an imprint on the gravitational-wave signal. As demonstrated in the case of GW170817, this leads to a constraint on the neutron star radius (and hence the equation of state). A deeper understanding of the tidal response requires an analysis of both the state and composition of matter. While these aspects may not have dramatic impact, they could lead to systematic effects that need to be kept in mind as the observational data become more precise. As a step in this direction we explore the role of the composition of matter, which is likely to remain "frozen" during the late stages of binary inspiral. We provide the first in-depth analysis of the problem, including estimates of how composition impacts on the effective tidal deformability. The results provide improved insight into how aspects of physics that tend to be "ignored" impact on binary neutron star gravitational-wave signals.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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