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arXiv 1302.1173gr-qc
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f(G)引力场中的无剪切耗散坍缩动力学

Dynamics of Shearfree Dissipative Collapse in f(G) Gravity

M. Sharif, G. Abbas

摘要:

本文研究了修正的Gauss-Bonnet引力理论中无剪切耗散引力坍缩的动力学,即所谓的f(G)引力。将f(G)引力场方程应用于耗散星的无剪切球内部几何。我们制定的动力学方程以及输运方程,然后将它们耦合到调查的崩溃过程。我们的结论是,在这个理论中的引力比广义相对论强得多,这表明在崩溃的速度增加。进一步建立了外尔张量与物质分量之间的关系。这表明,对于常数f(G),外尔标量的消失导致能量密度的均匀性,反之亦然。

英文摘要:

In this paper, we study the dynamics of shearfree dissipative gravitational collapse in modified Gauss-Bonnet theory of gravity - so called f(G) gravity. The field equations of f(G) gravity are applied to shearfree spherical interior geometry of the dissipative star. We formulate the dynamical as well as transport equations and then couple them to investigate the process of collapse. We conclude that the gravitational force in this theory is much stronger as compared to general relativity which indicates increase in the rate of collapse. Further, the relation between the Weyl tensor and matter components is established. This shows that for constant f(G) the vanishing of the Weyl scalar leads to the homogeneity in energy density and vice versa.

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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