论文标题
强烈的重力镜头通过强烈的赤裸裸的奇异性
Strong gravitational lensing by a strongly naked null singularity
论文作者
论文摘要
我们在没有光子球体的静态，球形对称，裸露的奇异性时空中研究强力透镜。发现奇异性的性质是浅色的。我们在强挠度极限下讨论了这种裸奇异性的特征性镜头特征。尽管在这个时空中没有光子球，但在接近奇异之处时，光的弯曲角也存在分歧。但是，与黑洞不同，发现这种差异的性质是非质体的，我们得出了同一分析公式。此外，发现由于奇异性强烈的镜头而产生的相对论环相互分离，使其易于解决并可能检测到。预计这些特征在研究强度镜头的强镜头的研究中很重要，尤其是没有事件范围的物体。
We study strong gravitational lensing in a static, spherically symmetric, naked singularity spacetime, without a photon sphere. The nature of the singularity is found to be lightlike. We discuss the characteristic lensing features of this naked singularity in the strong deflection limit. In spite of the absence of a photon sphere in this spacetime, the bending angle of light diverges, as it approaches the singularity. However, unlike black holes, it is found that the nature of this divergence is nonlogarithmic, and we derive an analytic formula for the same. Moreover, the relativistic rings produced due to strong lensing by the singularity are found to be well separated from each other, making them easy to resolve and possibly detect. These features are expected to be important in the study of strong lensing by ultracompact objects, especially ones without event horizons.
