Gravitational time delay due to a spinning string.
Gravitational time delay due to a spinning string.
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由于旋转的弦而引起的重力时间延迟。
DOI：
10.1103/physrevd.38.3320
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Polychronakos
中科院分区：
文献类型：
--
作者：
Harari;Polychronakos
我们证明，绕着每单位长度J携带角动量的直宇宙弦的重力会导致两个粒子的到达时间之间的延迟，这两个粒子描述了绕弦在每个点上以相同的速度运行但方向相反的任意闭合轨迹。时间延迟是16..pi..gj，其中G是牛顿常数。被延迟的粒子是在与角动量相反的意义上绕着封闭路径旋转的粒子。因此，由弦作为引力透镜产生的恒星的双重图像将获得相对时间延迟，从而提供了一种至少在原则上测量弦角动量的机制。然而，我们认为，在任何现实模型中，时间延迟的影响都是可以忽略的。我们还讨论了这种效应在2/+/1维的其他可能的含义。参考文献13，图1。
We show that gravity around a straight cosmic string that carries angular momentum per unit length J induces a delay between the arrival time of two particles that describe an arbitrary closed trajectory around the string with the same speed at each point but in opposite directions. The time delay is 16..pi..GJ, where G is Newton's constant. The particle delayed is the one that circles the closed path in the sense contrary to the angular momentum. As a consequence, double images of a star produced by the string acting as a gravitational lens will acquire a relative time delay, thus providing a mechanism, at least in principle, to measure the string angular momentum. We argue, however, that in any realistic model the time delay effect is negligible. We also discuss other possible implications of this effect in 2 /plus/ 1 dimensions. 13 refs., 1 fig.