Binary Love relations
Binary Love relations
复制标题
二元爱情关系
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
N. Yunes
中科院分区：
文献类型：
--
作者：
Kent Yagi;N. Yunes
在一个紧密的双星中，中子星的相互潮汐变形会被印在可观测物上，编码关于它们在超核密度下的内部结构和极端重力状态下的重力的信息。引力波（GW）观测它们的后期双星激励可以作为提取单个潮汐变形能力的工具，但由于引力波模型中它们之间的简并使得这变得困难。我们在这里通过发现个体潮汐变形能力的无量纲组合之间的近似状态方程（EoS）不敏感关系来解决这个问题。我们表明，这些关系打破了GW模型中的简并性，从而可以准确地提取两种可变形性。这样的测量可以用来更好地区分EoS模型，并改进广义相对论和宇宙学的测试。
When in a tight binary, the mutual tidal deformations of neutron stars get imprinted onto observables, encoding information about their internal structure at supranuclear densities and gravity in the extreme-gravity regime. Gravitational wave (GW) observations of their late binary inspiral may serve as a tool to extract the individual tidal deformabilities, but this is made difficult by degeneracies between them in the GW model. We here resolve this problem by discovering approximately equation-of-state (EoS)-insensitive relations between dimensionless combinations of the individual tidal deformabilities. We show that these relations break degeneracies in the GW model, allowing for the accurate extraction of both deformabilities. Such measurements can be used to better differentiate between EoS models, and improve tests of general relativity and cosmology.