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arXiv 1406.6938gr-qc
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论广义相对论体系中物体的形状

On the shape of bodies in General Relativistic regimes

Martin Reiris

摘要:

轴对称时空的分析,无论是动态的还是静态的,通常都是在约化空间中进行的。我们在这里证明了现状空间的稳定性,并使用它与最小曲面技术来约束广义相对论体的形状,在他们的能量和旋转。这些约束在本质上不同于特定物质体可能具有的机械限制,并且其可以禁止例如旋转速度超过一定速率(之后该物体分裂)。相反,我们描述的关系是基本的,适用于所有物体,尽管它们只在广义相对论体系中有用。对于中子星,它们接近于最优,虽然这些星的精确模型显示出更严格的约束,但我们的结果是有意义的,因为它们不依赖于状态方程。

英文摘要:

The analysis of axisymmetric spacetimes, dynamical or stationary, is usually made in the reduced space. We prove here a stability property of the quo- tient space and use it together with minimal surface techniques to constraint the shape of General Relativistic bodies in terms of their energy and rotation. These constraints are different in nature to the mechanical limitations that a particular material body can have and which can forbid, for instance, rotation faster than a certain rate, (after which the body falls apart). The relations we are describing instead are fundamental and hold for all bodies, albeit they are useful only in General Relativistic regimes. For Neutron stars they are close to be optimal, and, although precise models for these stars display tighter con- straints, our results are significative in that they do not depend on the equation of state.

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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