论文标题
奇怪的夸克星星在4d爱因斯坦 - 加斯 - 尼特重力
Strange Quark Stars in 4D Einstein-Gauss-Bonnet Gravity
论文作者
论文摘要
紧凑型恒星中奇怪的物质的存在可能会构成各种物理现象的引人注目的续集。作为中子恒星的替代方法，如果奇怪的假设是正确的，则应该存在一个新的称为“奇怪星星”的紧凑型星星。在本文中，我们根据MIT袋模型研究了Quark Matter阶段中奇怪的恒星的构造。我们考虑奇怪的星星没有外壳的场景。然后，我们将两种类型的状态方程式用于量化静态奇怪星模型的质量 - 拉迪乌斯图，以在$ 4D $ einstein $ einstein $ einstein-gauss-beverity的上下文中对修改的tolman-oppenheimer-volkoff（TOV）方程进行数值计算。值得注意的是，GB期限为极限$ d \至4 $的重力动态产生了非平凡的贡献。然而，关于由此产生的理论是纯粹的重力的说法是通过几个理由提出的。因此，我们开始讨论，显示正规化的$ 4D $ EGB理论在球形对称的时空中具有等效的动作，即新颖的$ 4D $ EGB。我们还研究了耦合常数$α$对构造奇怪恒星物理特性的影响，包括绝热稳定性的紧凑性和标准。最后，我们将我们的结果与从标准GR获得的结果进行了比较。
The existence of strange matter in compact stars may pose striking sequels of the various physical phenomena. As an alternative to neutron stars, a new class of compact stars called strange stars should exist if the strange matter hypothesis is true. In the present article, we investigate the possible construction of the strange stars in quark matter phases based on the MIT bag model. We consider scenarios in which strange stars have no crusts. Then we apply two types of equations of state to quantify the mass-radius diagram for static strange star models performing the numerical calculation to the modified Tolman-Oppenheimer-Volkoff (TOV) equations in the context of $4D$ Einstein-Gauss-Bonnet gravity. It is worth noting that the GB term gives rise to a non-trivial contribution to the gravitational dynamics in the limit $D \to 4$. However, the claim that the resulting theory is of pure graviton was cast in doubt by several grounds. Thus, we begin our discussion with showing the regularized $4D$ EGB theory has an equivalent action as the novel $4D$ EGB in a spherically symmetric spacetime. We also study the effects of coupling constant $α$ on the physical properties of the constructed strange stars including the compactness and criterion of adiabatic stability. Finally, we compare our results to those obtained from the standard GR.
