arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.2843gr-qc
收藏

狄克逊延拓体与弱引力波

Dixon's extended bodies and weak gravitational waves

Donato Bini, Christian Cherubini, Andrea Geralico, Antonello Ortolan

摘要:

广义相对论认为狄克逊理论是处理在给定引力背景下的扩展物体运动的标准理论。本文讨论了一个伸展体对弱引力波通过的“反应”的特征。我们发现,该机构获得的四极结构诱导的偶极矩。此外,我们还导出了引力波背景弱场极限的“世界函数”,并用它来估计结构体的测地线与世界线之间的偏差。由于累积效应的存在,测量这种偏差应该是测量引力波本身振幅的最佳选择。

英文摘要:

General relativity considers Dixon's theory as the standard theory to deal with the motion of extended bodies in a given gravitational background. We discuss here the features of the "reaction" of an extended body to the passage of a weak gravitational wave. We find that the body acquires a dipolar moment induced by its quadrupole structure. Furthermore, we derive the "world function" for the weak field limit of a gravitational wave background and use it to estimate the deviation between geodesics and the world lines of structured bodies. Measuring such deviations, due to the existence of cumulative effects, should be favorite with respect to measuring the amplitude of the gravitational wave itself.

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。

↑