Gravitational lensing by exotic objects
Gravitational lensing by exotic objects
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DOI：
10.1142/s0217732317300312
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发表时间：
2017-10
期刊：
影响因子：
--
通讯作者：
H. Asada
中科院分区：
文献类型：
--
作者：
H. Asada
本文综述了奇异天体（如Ellis虫洞透镜）引力透镜效应的唯象研究方法，其中奇异透镜天体可能遵循非标准形式的物态方程，也可能遵循修正的引力理论。本文提出了一个引力透镜模型，它的幂次与距离成反比，从而使史瓦西透镜和奇异透镜可以统一地描述为一个单参数的透镜族。作为观测意义，讨论了该透镜模型中的放大率、剪切、质心运动和时间延迟。
This paper reviews a phenomenological approach to the gravitational lensing by exotic objects such as the Ellis wormhole lens, where exotic lens objects may follow a non-standard form of the equation of state or may obey a modified gravity theory. A gravitational lens model is proposed in the inverse powers of the distance, such that the Schwarzschild lens and exotic lenses can be described in a unified manner as a one parameter family. As observational implications, the magnification, shear, photo-centroid motion and time delay in this lens model are discussed.