Strong gravitational lensing in a black-hole spacetime dominated by dark energy
Strong gravitational lensing in a black-hole spacetime dominated by dark energy
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暗能量主导的黑洞时空中的强引力透镜
DOI：
10.1103/physrevd.88.104007
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发表时间：
2013-08
期刊：
影响因子：
--
通讯作者：
Rong-Gen Cai
中科院分区：
文献类型：
--
作者：
Chikun Ding;Changqing Liu;Yuanyuan Xiao;Liqun Jiang;Rong-Gen Cai
研究了幻影场对强场引力透镜效应的影响。假设银河系中心超大质量天体的引力场是用一个幻影黑洞度规来描述的，我们估计了系数和观测值的数值，发现幻影场的影响与Reissner-Nordstrom黑洞中电荷的影响有些相似，即，偏转角和角间距随体模常数B而增大。然而，其他观测结果与Reissner-Nordstrom的情况相反，并显示了暗能量的影响，例如（i）压缩通常的黑洞并更有力地吸引光子，（ii）使相对论性爱因斯坦环大于通常的黑洞，（iii）不削弱通常的相对大小，这将有助于观测。
We study the influence of phantom fields on strong field gravitational lensing. Supposing that the gravitational field of the supermassive central object of the Galaxy is described by a phantom black hole metric, we estimate the numerical values of the coefficients and observations and find that the influence of the phantom fields is somewhat similar to that of the electric charge in a Reissner-Nordstrom black hole, i.e., the deflect angle and angular separation increase with the phantom constant b. However, other observations are contrary to the Reissner-Nordstrom case and show the effects of dark energy, such as (i) compressing the usual black hole and more powerfully attracting photons, (ii) making the relativistic Einstein ring larger than that of the usual black hole, and (iii) not weakening the usual relative magnitudes, which will facilitate observations.
影响因子：
3.5
作者：
S. Weinberg;R. Wagoner
通讯作者：
S. Weinberg;R. Wagoner
影响因子：
64.8
作者：
C. Alcock
通讯作者：
C. Alcock