论文标题
强烈赤裸裸的奇点的观察性特征：薄积聚磁盘的图像
Observational signatures of strongly naked singularities: image of the thin accretion disk
论文作者
论文摘要
我们研究了裸露的静态静态Janis-Newman-Winicour奇异性周围的薄积聚盘的光学外观。该溶液不具有光子球，这导致在磁盘图像的中央区域中形成明亮环的复杂结构。在Schwarzschild黑洞的情况下，这种结构不存在，带有薄的吸积盘，而不是图像，我们观察到黑洞的阴影。其中一些环由从吸积盘的最大观察辐射通量发射，应在实验上检测到。因此，这种质性的新功能可用于区分观察性黑洞和裸露的奇异性。我们通过揭示其形成的物理机理并解释每个环图像的性质来阐明环结构的外观。我们猜想的是，在没有光子球体的情况下，其他溶液也将出现类似的结构，并且可以用作区分没有光子球体与黑洞的一般观察签名。
We study the optical appearance of a thin accretion disk around the strongly naked static Janis-Newman-Winicour singularity. The solution does not possess a photon sphere, which results in the formation of a complex structure of bright rings in the central region of the disk image. Such structure is absent in the case of the Schwarzschild black hole with a thin accretion disk, where instead of the image we observe the black hole shadow. Some of the rings emit with the maximal observable radiation flux from the accretion disk, and should be experimentally detectable. Thus, this qualitatively new feature can be used to distinguish observationally black holes from naked singularities. We elucidate the appearance of the ring structure by revealing the physical mechanism of its formation, and explaining the nature of each of the ring images. We make the conjecture that a similar structure would also appear for other solutions without a photon sphere and it can serve as a general observational signature for distinguishing compact objects possessing no photon sphere from black holes.
