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arXiv 1203.0675gr-qcastro-ph.EPphysics.space-ph
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牛顿引力拓扑修正的特征尺度的下界

Lower bounds of characteristic scale of topological modification of the Newtonian gravitation

Lorenzo Iorio

摘要:

我们解析地计算了由扰动势展开的第一项引起的长期轨道扰动,该扰动势是由Floratos和Leontaris最近提出的具有半径为R的紧致维数的拓扑R^2 x S^1引起的牛顿平方反比定律的局部修改引起的。我们既不限制非对称轴的任何特定空间方向,也不限制测试粒子的特定轨道构型。因此,我们的结果是相当普遍的。非零长期变化发生在所有通常密切开普勒轨道要素,除了半长轴是不受影响的。利用卡西尼号资料测定土星轨道运动的最新进展,我们初步推断R >= 4-6 kau。作为一种补充方法,假定的拓扑效应应明确建模和解决的星历动态模型的修改版本,相同的数据集应重新处理。

英文摘要:

We analytically work out the long-term orbital perturbations induced by the first term of the expansion of the perturbing potential arising from the local modification of the Newton's inverse square law due to a topology R^2 x S^1 with a compactified dimension of radius R recently proposed by Floratos and Leontaris. We neither restrict to any specific spatial direction for the asymmetry axis nor to particular orbital configurations of the test particle. Thus, our results are quite general. Non-vanishing long-term variations occur for all the usual osculating Keplerian orbital elements, apart from the semimajor axis which is left unaffected. By using recent improvements in the determination of the orbital motion of Saturn from Cassini data, we preliminarily inferred R >= 4-6 kau. As a complementary approach, the putative topological effects should be explicitly modeled and solved-for with a modified version of the ephemerides dynamical models with which the same data sets should be reprocessed.

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