标题： 来自GW170817和I-Love-Q关系的启示：相对论混合恒星研究 显示英文标题

标题： Implications from GW170817 and I-Love-Q relations for relativistic hybrid stars

摘要： GW170817 的引力波观测限制了致密星的潮汐变形率，从而可以探测超核密度物质的状态方程。 在这里我们为混合重子-夸克状态方程设计了新的参数化方法，这些方法会产生低质量的双星，并用 GW170817 对它们进行检验。 我们发现 GW170817 与双混合星-中子星合并一致。 我们还测试了第三族混合星的 I-Love-Q 关系，发现对于缓慢和快速旋转构型，它们与纯重子和夸克星的关系在$\sim 3\%$范围内一致，这意味着这些关系可用于广义相对论的状态方程无关测试，并可打破第三族混合星引力波形的退化性。 显示英文摘要

摘要： Gravitational wave observations of GW170817 placed bounds on the tidal deformabilities of compact stars allowing one to probe equations of state for matter at supranuclear densities. Here we design new parametrizations for hybrid hadron-quark equations of state, that give rise to low-mass twin stars, and test them against GW170817. We find that GW170817 is consistent with the coalescence of a binary hybrid star--neutron star. We also test and find that the I-Love-Q relations for hybrid stars in the third family agree with those for purely hadronic and quark stars within $\sim 3\%$ for both slowly and rapidly rotating configurations, implying that these relations can be used to perform equation-of-state independent tests of general relativity and to break degeneracies in gravitational waveforms for hybrid stars in the third family as well.