Gravastar solutions with continuous pressures and equation of state
Gravastar solutions with continuous pressures and equation of state
复制标题
具有连续压力和状态方程的 Gravastar 解
DOI：
10.1088/0264-9381/23/7/007
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发表时间：
2005
影响因子：
3.5
通讯作者：
K. Viswanathan
中科院分区：
文献类型：
--
作者：
A. DeBenedictis;A. DeBenedictis;D. Horvat;D. Horvat;S. Ilijić;S. Kloster;K. Viswanathan
我们研究了由Cattoen et al （2005 Class）提出的引力真空星（gravastar）结构。量子引力，22 4189)在一个模型中，内部德西特时空段连续扩展到外部史瓦西时空。Mazur和Mottola的多层结构(2001 Preprint gr-qc/0109035, 2003 Proc.第六届外部条件影响下的量子场论研讨会（Oklahoma） （Princeton, NJ: Rinton）， Preprint gr-qc/0405111 （2004 Proc. Natl Acad. Sci. 111 9545）被连续应力-能量张量取代，代价是在重力星（流体）模型中引入各向异性。无论是对连接径向pr和切向pt压力的状态方程进行分析，还是对具有非均匀能量/流体密度的状态方程进行计算，得到的解在各方面都满足各向异性重力星的预期条件（Cattoen et al 2005 Class）。量子引力。22 4189)。在一定的能量条件下，得到了一个多向态方程。对于可能的轴向扰动，解的稳定性证明是成立的。
We study the gravitational vacuum star (gravastar) configuration as proposed by Cattoen et al (2005 Class. Quantum Grav. 22 4189) in a model where the interior de Sitter spacetime segment is continuously extended to the exterior Schwarzschild spacetime. The multilayered structure of Mazur and Mottola (2001 Preprint gr-qc/0109035, 2003 Proc. 6th Workshop on Quantum Field Theory Under the Influence of External Conditions (Oklahoma) (Princeton, NJ: Rinton), Preprint gr-qc/0405111 (2004 Proc. Natl Acad. Sci. 111 9545) is replaced by a continuous stress–energy tensor at the price of introducing anisotropy in the (fluid) model of the gravastar. Either with an ansatz for the equation of state connecting the radial pr and tangential pt pressure or with a calculated equation of state with non-homogeneous energy/fluid density, solutions are obtained which in all aspects satisfy the conditions expected for an anisotropic gravastar (Cattoen et al 2005 Class. Quantum Grav. 22 4189). Certain energy conditions have been shown to be obeyed and a polytropic equation of state has been derived. Stability of the solution with respect to possible axial perturbation is shown to hold.