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arXiv 1507.07441gr-qc
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具有自旋诱导四极张量的Kerr时空中扩展体的动力学

Dynamics of extended bodies in a Kerr spacetime with spin-induced quadrupole tensor

Donato Bini, Guillaume Faye, Andrea Geralico

摘要:

在Mathisson-Papapetrou-Dixon模型框架下研究了Kerr时空中扩展体的赤道运动特征。假设物体处于准平衡状态,并对外界扰动立即作出反应。除了质量,它完全由自旋决定,多极展开在四极阶被截断,带有自旋诱导的四极张量。径向有效势的研究允许解析地确定由于自旋和最后一个圆形轨道的相关频率引起的ISCO位移。

英文摘要:

The features of equatorial motion of an extended body in Kerr spacetime are investigated in the framework of the Mathisson-Papapetrou-Dixon model. The body is assumed to stay at quasi-equilibrium and respond instantly to external perturbations. Besides the mass, it is completely determined by its spin, the multipolar expansion being truncated at the quadrupole order, with a spin-induced quadrupole tensor. The study of the radial effective potential allows to analytically determine the ISCO shift due to spin and the associated frequency of the last circular orbit.

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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