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arXiv 2207.02130gr-qcastro-ph.HE
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纯Lovelock几何对恒星结构的物理意义

Physical Implications of Pure Lovelock Geometry on Stellar Structure

Ksh. Newton Singh, Megandhren Govender, Sudan Hansraj, Farook Rahaman

摘要:

在纯Lovelock引力框架下,利用Finch-Skea势和线性正压状态方程,构造了一个精确的各向异性星模型。与相应的爱因斯坦模型在一个适当的限制是很容易推导出的比较。明显地,由Lovelock贡献引起的更高的曲率效应与其爱因斯坦对应物相比产生更低的密度、压力、表面张力和各向异性因子。在Einstein情况下得到最大的转动惯量,因此可以推断Lovelock效应软化了状态方程。该模型满足各种稳定性测试。

英文摘要:

We construct an exact anisotropic star model with a linear barotropic equation of state and with Finch-Skea potential within the framework of pure Lovelock gravity. A comparison with the corresponding Einstein model in a suitable limit is easily deduced. Evidently higher curvature effects induced by the Lovelock contributions generate lower densities, pressures, surface tensions and anisotropy factors when compared to its Einstein counterpart. The maximum moment of inertia is attained for the Einstein case and hence it may be inferred that Lovelock effects soften the equation of state. The model satisfies various stability tests.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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