中子星的潮汐变形：分层和弹性的作用
Tidal deformations of neutron stars: The role of stratification and elasticity
摘要：
本文讨论了中子星对致密双星系统中潮汐相互作用的响应，这种响应被编码在与诱导形变有关的洛夫数中。这个问题是引力波天文学的兴趣，因为可能有一个可检测的印记的信号，从后期阶段的双合并。以前的工作集中在简单的正压中子星模型，提供了一个了解的作用，恒星的紧凑性和整体密度分布。我们增加现实主义的讨论，发展所需的框架模型恒星不同的组成和弹性地壳。预计这些影响对下一代探测器来说并不重要，但能够量化它们仍然是有用的。我们的研究结果表明（也许令人惊讶）内部分层对Love数没有任何影响。我们还表明，地壳弹性提供了一个（可预见的）小修正现有的模型。
英文摘要：
We discuss the response of neutron stars to the tidal interaction in a compact binary system, as encoded in the Love number associated with the induced deformation. This problem is of interest for gravitational-wave astronomy as there may be a detectable imprint on the signal from the late stages of binary coalescence. Previous work has focussed on simple barotropic neutron star models, providing an understanding of the role of the stellar compactness and overall density profile. We add realism to the discussion by developing the framework required to model stars with varying composition and an elastic crust. These effects are not expected to be significant for the next generation of detectors but it is nevertheless useful to be able to quantify them. Our results show that (perhaps surprisingly) internal stratification has no impact whatsoever on the Love number. We also show that crust elasticity provides a (predictably) small correction to existing models.
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