Radiation Damping in Einstein-Aether Theory
Radiation Damping in Einstein-Aether Theory
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DOI：
10.1103/physrevd.73.104012
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发表时间：
2006-02
影响因子：
5
通讯作者：
B. Foster
中科院分区：
文献类型：
--
作者：
B. Foster
这项工作涉及爱因斯坦-以太理论中由于引力辐射而导致的物质系统的能量损失。爱因斯坦-以太理论是引力的另一种理论，其中度量耦合到一个动态的、类时的、单位范数的向量场。导出到最低后牛顿阶的是远离近牛顿系统的度规场和矢量场的波形以及系统辐射的能量率。这些表达式依赖于源的四极矩，就像在标准广义相对论中一样，但也包含单极和偶极项。存在一个单参数的爱因斯坦-以太理论家族，其中只有四极贡献存在，并且阻尼率的表达式与广义相对论的表达式相同，对于这里的工作顺序。由于在用于测试阻尼率的实际系统中，由于物体的强内部场的影响尚未确定，因此尚不能宣布该系列在观测上是可行的。
This work concerns the loss of energy of a material system due to gravitational radiation in Einstein-aether theory - an alternative theory of gravity in which the metric couples to a dynamical, timelike, unit-norm vector field. Derived to lowest post-Newtonian order are wave forms for the metric and vector fields far from a nearly Newtonian system and the rate of energy radiated by the system. The expressions depend on the quadrupole moment of the source, as in standard general relativity, but also contain monopolar and dipolar terms. There exists a one-parameter family of Einstein-aether theories for which only the quadrupolar contribution is present, and for which the expression for the damping rate is identical to that of general relativity to the order worked to here. This family cannot yet be declared observationally viable, since effects due to the strong internal fields of bodies in the actual systems used to test the damping rate have not yet been determined.