论文标题
4D爱因斯坦 - 加斯 - 鲍尼特重力中的各向同性紧凑型恒星
Isotropic compact stars in 4D Einstein-Gauss-Bonnet gravity
论文作者
论文摘要
最近，有人提出，可以适当地重新恢复Lovelock重力的高斯 - 骨网耦合参数，以便接受天体现象的物理可行模型，从而使较高的曲率效应在标准的四个维度中具有与常规更高维度相反。我们在恒星建模的背景下研究了这种修饰的后果。完美流体分布的演变受压力各向异性条件的控制，并通过规定了从主差分方程的溶液中出现的一种度量势模型之一。已经报道了使用这种方法的新的精确解决方案。详细分析了一个特定的模型，并显示出与逼真的紧凑型恒星所需的基本物理要求相提并论，这表明修改的理论与观察并不矛盾。
Recently it has been proposed that the Gauss-Bonnet coupling parameter of Lovelock gravity may suitably be rescaled in order to admit physically viable models of celestial phenomena such that higher curvature effects are active in standard four dimensions as opposed to the usual higher dimensions. We investigate the consequences of this modification in the context of stellar modelling. The evolution of perfect fluid distributions is governed by the pressure isotropy condition and through stipulation of one of the metric potentials complete models emerge from solutions of the master differential equation. New classes of exact solution with this approach have been reported. One particular model is analysed in detail and shown to comport with elementary physical requirements demanded of realistic compact stars suggesting that the modified theory is not inconsistent with observations.
