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arXiv 1806.09433gr-qc
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辐射球形坍缩与非均匀内部解的匹配

Radiating Spherical Collapse for an Inhomogeneous Interior Solution

Centro Brasileiro de Pesquisas Físicas(巴西物理研究中心)

Eduardo Bittencourt, Vanessa P Freitas, José M Salim, Grasiele B Santos

AI总结:

研究通过匹配非均匀内部解与外部度规,探讨粘性流体和电磁场对球形坍缩最终状态的影响。

摘要:

我们分析了考虑外部区域由Vaidya度规描述,内部区域由球对称、无剪切、非均匀几何描述的引力坍缩问题,该几何由粘性流体源产生。我们建立了初始和最终条件,以确保结果是一个非奇异物体,当可能时,并检查其依赖于能量条件的满足情况。然后,我们明确地将匹配过程应用于描述恒星内部电磁场的线性和非线性拉格朗日量的情况,并分析不同行为的标度因子导致坍缩的奇异或非奇异最终阶段,这取决于初始条件所在的范围。

英文摘要:

We analyze the problem of gravitational collapse considering the matching of an exterior region described by the Vaidya's metric and an interior region described by a spherically symmetric shear-free inhomogeneous geometry sourced by a viscous fluid. We establish initial and final conditions for the process in order that the outcome be a non-singular object, when this is possible, and check how it depends on the fulfillment of the energy conditions. We then apply explicitly the matching procedure to the cases of linear and nonlinear Lagrangians describing electromagnetic fields inside the star, and analyze how the different behaviors for the scale factor of the interior geometry produce singular or nonsingular final stages of the collapse depending on the range where the initial conditions lie.

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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