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arXiv 0803.4309gr-qcastro-phhep-ph
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张量-矢量-标量理论中的后牛顿参数

Post-Newtonian parameters in the tensor-vector-scalar theory

Takashi Tamaki

摘要:

我们调查后牛顿参数的张量矢量标量(TeVeS)理论在一般情况下,而以前的研究已被限制在球对称的情况下。在假设物理和爱因斯坦度规都具有零阶Minkowski度规的基础上,我们得到了与前人研究相同的$γ=1$.对于其他参数,我们发现了两个值得注意的事情。第一个是值$β=1$,而据报道,当向量场不是纯类时,值为$β\neq 1$。这种差异是从上述假设开始的,这是很自然的。第二个结果是牛顿势必须是静态的才能与矢量方程一致。因此,我们无法确定$α_{1}$和$α_{2}$。我们认为这与最近报道的各种初始扰动的线性扰动不稳定性和焦散奇点的出现有关。

英文摘要:

We investigate post-Newtonian parameters in the tensor-vector-scalar (TeVeS) theory in a general setting while previous researches have been restricted to spherically symmetric cases. Based on the assumption that both the physical and Einstein metrics have Minkowski metric at the zeroth order, we show $γ=1$ as in the previous researches. We find two remarkable things for other parameters. The first is the value $β=1$ while it has been reported that $β\neq 1$ for the case when the vector field is not purely timelike. This discrepancy occurs from the above assumption which is natural as a starting point. The second is the result that the Newtonian potential must be static to be consistent with the vector equation. As a result, we cannot determine $α_{1}$ and $α_{2}$. We consider that it is related to the instability against linear perturbation and occurrence of caustic singularities for various initial perturbations which have been reported recently.

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