论文标题
$ f（r，g）$重力的紧凑相对论几何形状
Compact relativistic geometries in $f(R,G)$ gravity
论文作者
论文摘要
描述宇宙快速扩张的潜在候选者之一是重力。在修改后的重力理论$ f（r，g）$的框架中，目前的工作具有各向异性物质的物质化，例如紧凑型恒星。具体来说，要了解有关紧凑型星的身体行为，径向和切向压力以及六星级的能量密度，即$ x-1 $，$ saxj1808.4-3658 $，$ 4U1820-30 $，$ PSR J 1614 2230 $，$ VELA X-1 $，$ VELA X-1 $，以及$ CEN X-3 $ CEN X-3 $ CEN X-3 $ CEN x-3均为3 $ 3 $ CEN X-3 $ 3均为3 $ 3均为3 $ 3均为3 $ 3均为3岁。本文中，修改的重力理论$ f（r，g）$分为两个部分，即$ \ tanh $柔软的$ f（r）$模型和三种不同的$ f（g）$模型。该研究的重点是对紧凑型恒星的图形分析，其中稳定性方面，能量条件和各向异性测量主要解决。我们的计算表明，对于模型$ f（g）$的参数n的正值，所有六颗星的表现正常。
One of the possible potential candidates for describing the universe's rapid expansion is modified gravity. In the framework of the modified theory of gravity $f(R,G)$, the present work features the materialization of anisotropic matter, such as compact stars. Specifically, to learn more about the physical behavior of compact stars, the radial, and tangential pressures as well as the energy density of six stars namely $Her X-1$, $SAXJ1808.4-3658$, $4U1820-30$, $PSR J 1614 2230$, $VELA X-1$, and $Cen X-3$ are calculated. Herein, the modified theory of gravity $f(R,G)$ is disintegrated into two parts i.e. the $\tanh$ hyperbolic $f(R)$ model and the three different $f(G)$ model. The study focuses on graphical analysis of compact stars wherein the stability aspects, energy conditions, and anisotropic measurements are mainly addressed. Our calculation revealed that, for the positive value of parameter n of the model $f(G)$, all the six stars behave normally.
