arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1006.2280gr-qc
收藏

球壳的牛顿和广义相对论模型-- II

Newtonian and General Relativistic Models of Spherical Shells - II

D. Vogt, P. S. Letelier

摘要:

由有限半径球的叠加得到一族表示有限厚度球壳的势密度对。通过球和有限壳的反演变换,得到了其他具有中心孔的无限厚壳族。我们还提出了一族有限厚度双层壳。所有的势-密度对都是解析的,可以用初等函数来表示。对于上述结构,我们研究了测试粒子的圆轨道及其在径向扰动下的稳定性。所有的例子都是稳定的。一个特殊的各向同性形式的度规在球坐标系中被用来构建一个广义相对论版本的牛顿家庭的球和壳。这些结构的物质是各向异性的,各向异性的程度是半径的函数。

英文摘要:

A family of potential-density pairs that represent spherical shells with finite thickness is obtained from the superposition of spheres with finite radii. Other families of shells with infinite thickness with a central hole are obtained by inversion transformations of spheres and of the finite shells. We also present a family of double shells with finite thickness. All potential-density pairs are analytical and can be stated in terms of elementary functions. For the above-mentioned structures, we study the circular orbits of test particles and their stability with respect to radial perturbations. All examples presented are found to be stable. A particular isotropic form of a metric in spherical coordinates is used to construct a General Relativistic version of the Newtonian families of spheres and shells. The matter of these structures is anisotropic, and the degree of anisotropy is a function of the radius.

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。

↑