论文标题
黑洞和无水平物体的光子环中奇异性物理的通用签名
Universal signatures of singularity-resolving physics in photon rings of black holes and horizonless objects
论文作者
论文摘要
在量子重力的方法及以后，存在黑孔中奇异性分辨率的不同机制。在我们详细阐述的一组假设下，这些机制在球形对称的黑洞的阴影图像中留下了烙印。我们发现，如果将M87*的EHT测量与黑洞质量的独立测量结合在一起，即使当前的EHT精度也足以在一个修改后的时空中对新物理的规模放置非平凡的约束。在其他空间上，要求提高准确性，以使下一代EHT可能交付。我们展示了$ n = 1 $和$ n = 2 $ photon环的组合是对常规黑洞的时空几何形状的有力探测，即使考虑了积聚磁盘中的天体不确定性。此外，我们生成包含局部发射区域的图像，灵感来自吸积流中热点的想法。最后，我们研究了无水平物体的光子环结构，该物体的特征是两个或没有光子球。当空间中没有光子球体时，我们显示光子环如何相互消灭。
Within quantum-gravity approaches and beyond, different mechanisms for singularity resolution in black holes exist. Under a set of assumptions that we spell out in detail, these mechanisms leave their imprint in shadow images of spherically symmetric black holes. We find that even current EHT accuracy is sufficient to place nontrivial constraints on the scale of new physics within one modified spacetime, if the EHT measurement of M87* is combined with an independent measurement of the black-hole mass. In other spacetimes, increased accuracy is required that the next-generation EHT may deliver. We show how the combination of $n=1$ and $n=2$ photon rings is a powerful probe of the spacetime geometry of regular black holes, even when considering astrophysical uncertainties in accretion disks. Further, we generate images containing a localized emission region, inspired by the idea of hotspots in accretion flows. Finally, we investigate the photon-ring structure of a horizonless object, which is characterized by either two or no photon spheres. We show how photon rings annihilate each other, when there is no photon sphere in the spacetime.
