论文标题
建造纽顿后中子星星
Building post-Newtonian neutron stars
论文作者
论文摘要
由于其紧凑性，中子恒星涉及强重力和极端密度的物理学。然而，目前，有多种问题在弱重力的情况下（至少在概念上）可以取得进展（至少在概念上）。由此激励，我们检查了如何使用牛顿后近似与一般相对论建模中子恒星的准确性。通常，我们发现如何制定恒星结构后的牛顿后方程式有很大的自由度。我们在配方中讨论了这种灵活性，并提供了示例以证明对恒星模型的影响。我们还考虑使用各向同性坐标建立中子星的（密切相关的）问题。在这种情况下，我们提供了一种新的策略来求解方程式（基于缩放参数），从而大大简化了问题。
Owed to their compactness, neutron stars involve strong gravity and extreme density physics. Nevertheless, at present, there are a variety of problems where progress (at least conceptually) can be made in the context of weak gravity. Motivated by this we examine how accurately one can model neutron stars using the post-Newtonian approximation to general relativity. In general, we find there is a significant degree of freedom in how the post-Newtonian equations of stellar structure can be formulated. We discuss this flexibility in the formulation and provide examples to demonstrate the impact on stellar models. We also consider the (closely related) problem of building neutron stars using isotropic coordinates. In this context, we provide a new strategy for solving the equations (based on a scaling argument) which significantly simplifies the problem.
