2020/11/16 by Sudan Hansraj, Ayan Banerjee, Lushen Moodly +2
Physics and Astronomy · #Black Holes and Theoretical Physics #Context (archaeology) #Cosmology and Gravitation Theories #Curvature #Differential geometry #Gravitation #Isotropy #Metric (unit) #Perfect fluid #Pulsars and Gravitational Waves Research #Stars #gr-qc
paper · pdf · doi:10.1088/1361-6382/abcb0d
19 pages, 9 figures, accepted for publication in Class.Quant.Grav
arxiv created 2020/11/16 · openalex publication_date 2020/11/17 · openalex created_date 2020/11/23 · arxiv updated 2021/02/03 · openalex updated_date 2026/08/05
Abstract 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.