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arXiv 1209.3584gr-qcastro-ph.CO
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评“非真空共形平坦时空:暗能量“

Comment on "Non-vacuum conformally flat space-times: dark energy"

Hristu Culetu

摘要:

Ibohal,Ishwarchandra和Singh提出了一类应力张量$T_{ab}$具有负压的爱因斯坦方程的精确的、非真空的、共形平坦的解。我们发现,$T_{ab}$对应于各向异性流体和状态方程参数似乎不是$ω= -1/2$。我们认为作者的常数不能是测试粒子的质量,而是与匀加速观测者的球形分布的Rindler加速度有关。

英文摘要:

Ibohal, Ishwarchandra and Singh proposed a class of exact, non-vacuum and conformally flat solutions of Einstein's equations whose stress tensor $T_{ab}$ has negative pressure. We show that $T_{ab}$ corresponds to an anisotropic fluid and the equation of state parameter seems not to be $ω= -1/2$. We consider the authors' constant cannot be the mass of a test particle but is related to a Rindler acceleration of a spherical distribution of uniformly accelerating observers.

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