Gravitational lensing by phantom black holes

被引：52
|
作者：
Gyulchev, Galin N. [1 ]
Stefanov, Ivan Zh [2 ]
机构：
[1] St Kliment Ohridski Univ Sofia, Fac Med, Dept Phys Biophys & Roentgenol, Sofia 1407, Bulgaria
[2] Tech Univ Sofia, Dept Appl Phys, Sofia 1000, Bulgaria
来源：
PHYSICAL REVIEW D | 2013年 / 87卷 / 06期
关键词：
DARK ENERGY; MATTER; FIELD;
D O I：
10.1103/PhysRevD.87.063005
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In some models dark energy is described by phantom scalar fields (scalar fields with the "wrong" sign of the kinetic term in the Lagrangian). In the current paper we study the effect of phantom scalar field and/or phantom electromagnetic field on gravitational lensing by black holes in the strong deflection regime. The black-hole solutions that we have studied have been obtained in the frame of the Einstein-(anti-)Maxwell-(anti)dilaton theory. The numerical analysis shows a considerable effect of the phantom scalar and electromagnetic fields on the angular position, brightness, and separation of the relativistic images. DOI: 10.1103/PhysRevD.87.063005
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页数：12
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