广义相对论中的辐射跳跃条件
Radiating jump conditions in General Relativity
摘要:
基于质量函数和表面渗透率两个参数,给出了广义相对论中球面不连续面的统一描述。所考虑的表面为:\textit{Impulsive fronts},块状可渗透层; \textit{Surface layers},块状不可渗透层; \textit{Shock fronts},无质量可渗透表面;和\textit{Boundary surfaces},无质量不可渗透表面。我们推导出物理变量在所有这些表面上的精确跳跃条件。最后,我们从研究含间断面的慢流体动力学过程出发,讨论了准静态近似。
英文摘要:
We present a unified description of spherical discontinuity surfaces in General Relativity based on two parameters: mass function and surface permeability. The surfaces considered are: \textit{Impulsive fronts}, massive permeable layer; \textit{Surface layers}, massive impermeable layer; \textit{Shock fronts}, massless permeable surface; and \textit{Boundary surfaces}, massless impermeable surface. We derive the exact jump conditions for the physical variables across all these surfaces. Finally, we discuss the quasi-static approximation from studying slow hydrodynamic processes involving discontinuity surfaces.
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