超子-Δ混合相状态方程与致密星性质研究

大质量脉冲星的观测和从GW170817引力波事件提取的潮汐形变性质为状态方程提供了最严格的实测约束，也为奇特致密物态的理论提供了全新的限制。基于协变密度泛函理论，同时考虑超子和Δ-共振态的状态方程模型可以完全满足上述约束，成为一种非常有前景的模型。关于超子-Δ混合相致密星的前期工作主要侧重于静态性质，依托该项目将根据观测或理论新进展，进一步深入研究静态性质并重点探索其动力学性质：1）研究先前工作中尚未涉及的静态性质，如非核子重子态对双星系统发射的引力波信号相位的影响；2）研究广义相对论平衡组态下的转动性质，包括相关整体参数、自旋演化和旋转诱导相变；3）在不同的重子超流性和中微子发射假设下，研究非磁化不转的孤立和吸积中子星的热演化。通过与仅含核子态的模型结果进行比较，发现其中的相似性、差异性和独特性，为进一步约束致密物质的性质，特别是其成分提供重要指导。

The measurements of supermassive pulsars in binaries and the tidal deformability deduced from GW170817 event provide the most clean and stringent observational constraints on the underlying equation of state. These discoveries provided robust constraints for the theory of exotic dense matter as well, bringing into question the existence of heavy (strange) baryons in the interiors of neutron stars. The relativistic density functional based models appear to be consistent with the data if both the effects of hyperons and Δ-resonances are taken into account, being a very promising model. Previous work mainly focused on the static global properties of Δ admixed hypernuclear compact stars, under this project we shall further study their static properties and, importantly, concentrate on their dynamics properties: 1) The static properties that have not been addressed yet in previous studies, e.g., the impact of heavy baryonic state on the phase of the gravitational-wave signal emitted by binary neutron star; 2) The rotating properties in equilibrium configurations in general relativity including their global parameters, spin evolution, and the rotationally induced phase transitions; 3) The thermal evolution of non-magnetized and non-rotating spherically-symmetric isolated and accreting neutron stars under different hypothesis concerning baryon superfluidity and neutrino emission. By comparing the results to those with only nucleons to find similarities, differences, and unique features that have the potential to further constraining the physics of dense matter, especially its composition.