论文标题
旋转轴玻色子星星
Rotating Axion Boson Stars
论文作者
论文摘要
我们构建和研究旋转的轴突玻色子恒星（RABSS）。这些是最近在Arxiv中引入的球形引力孤子的旋转概括：1909.05515。 Rabs在Einstein-Klein-Gordon理论的常规解中是渐近的，固定的，轴向对称的，在存在周期性标量势中，在轴突样颗粒的模型中产生。电位的特征是两个参数：标量场的质量$ m_a $和衰减常数$ f_a $。我们介绍了解决方案空间的概述，以$ f_a $的不同值，并分析了它们的某些现象学特性。对于大衰减常数，溶液与标准旋转迷你玻色子恒星相同。另一方面，对于小衰减常数，解决方案会产生独特的特征。特别是，我们分析了它们的紧凑性，梯形的出现，灯环的出现以及稳定且不稳定的赤道静态圆形圆形轨道（包括最内向稳定的圆形轨道）的分布。我们还确定了某些RABS的物理观察者强大能量条件的发生。我们观察到Rabs之间的一些类比和旋转引力的$ Q $ -Balls。
We construct and study rotating axion boson stars (RABSs). These are the spinning generalisations of the spherical gravitating solitons recently introduced in arXiv:1909.05515. RABSs are asymptotically flat, stationary, axially symmetric, everywhere regular solutions of the Einstein-Klein-Gordon theory, in the presence of a periodic scalar potential arising in models of axion-like particles. The potential is characterised by two parameters: the mass of the scalar field $m_a$ and the decay constant $f_a$. We present an overview of the solution space, for different values of $f_a$, and analyse some of their phenomenological properties. For large decay constants the solutions become identical to the standard spinning mini boson stars. For small decay constants, on the other hand, the solutions develop distinctive features. In particular, we analyse their compactness, the emergence of ergoregions, light rings and the distribution of stable and unstable equatorial timelike circular orbits, including the innermost stable circular orbit. We also establish the occurrence of violations of the strong energy condition for physical observers, for some RABSs. We observe some analogy between RABSs and spinning gravitating $Q$-balls.
