原中子星演化过程中的强子-夸克相变
Hadron-quark phase transitions along proto-neutron-star evolution
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中文总结 AI 辅助
本研究推导高温混杂物态方程，结合Skyrme有效相互作用与矢量MIT袋模型，模拟原混杂星演化，发现其早期阶段对后期最大引力质量的确定有重要作用。
中文摘要 AI 辅助
多信使天文学的新时代要求精确且自洽地推导高温下的核物态方程。本工作聚焦于高温混杂物态方程的计算，研究具有夸克物质核心的原中子星（原混杂星）的不同演化阶段。对于强子物质，我们采用两种不同的Skyrme有效相互作用；对于夸克物质，则使用著名的矢量MIT袋模型。为模拟系统中中微子被俘获的阶段，我们考虑了轻子分数的全局守恒，这得到了具有扩展混合相的物态方程。对于原中子星中微子扩散阶段之后的时期，物态方程根据局域或全局电荷守恒的假设，分别用麦克斯韦构造和吉布斯构造进行建模。利用推导得到的混杂模型，我们求解了托尔曼-奥本海默-沃尔科夫方程以描述对应的混杂星结构。最后，我们通过恒静质量序列研究了原混杂星的结构如何演化。我们发现，无论电荷是全局守恒还是局域守恒，混杂星早期演化阶段对其后期最大引力质量的确定可能起着关键作用。
英文摘要
The new era of multi-messenger astronomy requires the accurate and self-consistent derivation of the nuclear equation of state at high temperature. In the present work, we focused on the calculation of hot hybrid equations of state, studying the different evolution stages of a proto-neutron star with a quark matter core (proto-hybrid star). For the hadronic matter we used two distinct Skyrme effective interactions, while for quark matter the well-known vector MIT bag model was employed. To model the era of trapped neutrinos in the system we considered the global conservation of lepton fraction which resulted in an equation of state with an extended mixed phase. For periods following the neutrino diffusion phase of a proto-neutron star, the equations of state were modelled using both the Maxwell and the Gibbs construction depending on the assumption for either local or global electric-charge conservation. With the use of the derived hybrid models, we solved the Tolman-Oppenheimer-Volkov equations to describe the corresponding hybrid star configurations. Finally, we investigated how the structure of proto-hybrid stars evolves, using constant rest mass sequences. We found that regardless of whether electric-charge is globally or locally conserved, the earlier stages of a hybrid star's life may play a crucial role on the determination of its maximum possible gravitational mass in later stages.
