Gravitational Lensing by Phantom Black holes
Gravitational Lensing by Phantom Black holes
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DOI：
10.1103/physrevd.87.063005
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发表时间：
2012-11
影响因子：
5
通讯作者：
G. Gyulchev;I. Stefanov
中科院分区：
文献类型：
--
作者：
G. Gyulchev;I. Stefanov
在一些模型中，暗能量是用幻影标量场(拉格朗日中的动量项带有“错误”符号的标量场)来描述的。在本文中，我们研究了在强偏转区，幻象标量场和/或幻象电磁场对黑洞引力透镜的影响。我们所研究的黑洞解是在爱因斯坦-(反)麦克斯韦-(反)膨胀子理论的框架下得到的。数值分析表明，体模标量场和电磁场对相对论图像的角位置、亮度和分离有相当大的影响。
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.