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Isotropic compact stars in 4D Einstein-Gauss-Bonnet gravity
Classical and Quantum Gravity ( IF 3.5 ) Pub Date : 2020-12-22 , DOI: 10.1088/1361-6382/abcb0d
Sudan Hansraj 1 , Ayan Banerjee 1 , Lushen Moodly 1 , M K Jasim 2
Affiliation  

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.

中文翻译:

4D 爱因斯坦-高斯-博内引力中的各向同性致密星

最近有人提议,可以适当地重新调整洛夫洛克引力的高斯-博内耦合参数,以承认天体现象的物理可行模型,从而使更高的曲率效应在标准四维中活跃,而不是通常的更高维。我们在恒星建模的背景下研究了这种修改的后果。完美流体分布的演变受压力各向同性条件的控制,并且通过对度量势之一的规定,从主微分方程的解中出现完整模型。已经报道了使用这种方法的新类别的精确解。
更新日期:2020-12-22
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