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arXiv 1510.02016gr-qc
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旋转变形引力源场中的测地线

Geodesics in the field of a rotating deformed gravitational source

Kuantay Boshkayev, Hernando Quevedo, Marzhan Abutalip, Zhanerke Kalymova, Sharara Suleymanova

摘要:

研究了近似Hartle-Thorne度规描述的旋转变形源的引力场中的赤道测地线。在大质量粒子的情况下,我们推导出在相同的近似解析表达式的轨道角速度,特定的角动量和能量,和半径的边缘稳定和边缘绑定的圆形轨道。此外,我们还计算了类光圆测地线的轨道角速度和半径。数值研究了标架拖曳效应和源的四极形变对实验粒子运动的影响。我们表明,源于旋转的影响可以平衡的影响,由于扁率的源。

英文摘要:

We investigate equatorial geodesics in the gravitational field of a rotating and deformed source described by the approximate Hartle-Thorne metric. In the case of massive particles, we derive within the same approximation analytic expressions for the orbital angular velocity, the specific angular momentum and energy, and the radii of marginally stable and marginally bound circular orbits. Moreover, we calculate the orbital angular velocity and the radius of lightlike circular geodesics. We study numerically the frame dragging effect and the influence of the quadrupolar deformation of the source on the motion of test particles. We show that the effects originating from the rotation can be balanced by the effects due to the oblateness of the source.

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