论文标题
基于薄壳形式的球形行星星云的演变的几何模型
A Geometrical Model for the Evolution of Spherical Planetary Nebulae Based on Thin-Shell Formalism
论文作者
论文摘要
球形星云描述为几何模型。星云本身被认为是一个薄壳，可视化为两个空间的边界。发现薄壳的内部和外曲率张量，以便在薄壳上表达能量孔张量。能量密度和压力表达是使用能量量张量得出的。薄壳半径的时间演变是根据能量密度获得的。通过使用简单的功率函数来降低能量密度并实现行星星云的演化模式来测试该模型。
A spherical planetary nebula is described as a geometric model. The nebula itself is considered as a thin-shell which visualized as a boundary of two spacetimes. The inner and outer curvature tensors of the thin-shell are found in order to get an expression of the energy-momentum tensor on the thin-shell. The energy density and pressure expressions are derived using the energy-momentum tensor. The time evolution of the radius of the thin-shell is obtained in terms of the energy density. The model is tested by using a simple power function for decreasing energy density and the evolution pattern of the planetary nebula is attained.
