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arXiv 2103.15549gr-qc
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关于定常轴对称真空时空中的位似Killing矢量

On homothetic Killing vectors in stationary axisymmetric vacuum spacetimes

Abbas M. Sherif, Peter K. S. Dunsby, Rituparno Goswami, Sunil D. Maharaj

摘要:

在本文中,我们考虑位似Killing向量类的静态轴对称真空(SAV)时空,其中的向量的分量是时间和径向坐标的函数。在这种情况下,任何位似Killing矢量沿$z$方向的分量必须是常数。首先,它表明,沿径向方向的分量是恒定的,或者我们有比例$g_{ϕϕ}\propto g_{ρρ}$,其中$g_{ϕϕ}>0$。在这两种情况下,进行了完整的分析,并确定了位似Killing向量的一般形式。还得到了相应的共形因子。在度量中扭转为零的情况下,即,$ω= 0$被认为是位似Killing向量的完整形式的确定,以及相关的共形因子。

英文摘要:

In this paper we consider homothetic Killing vectors in the class of stationary axisymmetric vacuum (SAV) spacetimes, where the components of the vectors are functions of the time and radial coordinates. In this case the component of any homothetic Killing vector along the $z$ direction must be constant. Firstly, it is shown that either the component along the radial direction is constant or we have the proportionality $g_{ϕϕ}\propto g_{ρρ}$, where $g_{ϕϕ}>0$. In both cases, complete analyses are carried out and the general forms of the homothetic Killing vectors are determined. The associated conformal factors are also obtained. The case of vanishing twist in the metric, i.e., $ω= 0$ is considered and the complete forms of the homothetic Killing vectors are determined, as well as the associated conformal factors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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