论文标题
如今和下一代事件地平线望远镜阵列可见
Horizonless spacetimes as seen by present and next-generation Event Horizon Telescope arrays
论文作者
论文摘要
我们研究当前和未来无线电的非常长的基线式互化阵列的功能，以区分黑洞和无地面空间。我们考虑了一个无视时空的示例，该示例是通过超过常规黑洞而获得的。由于阴影内部的第二组光子环，它的图像与Kerr时空的图像不同。这些光子环不能通过当前甚至下一代事件望远镜阵列直接解决，而是相对于黑洞的亮度过多的中央亮度，而是将自己的印象刻在地平线尺度图像中。我们证明未来的阵列可以检测到这种间接的烙印。
We study the capabilities of present and future radio very-long-baseline-interferometry arrays to distinguish black holes from horizonless spacetimes. We consider an example of a horizonless spacetime, obtained by overspinning a regular black hole. Its image is distinct from the image of a Kerr spacetime due to a second set of photon rings interior to the shadow. These photon rings cannot be directly resolved by present and even next-generation Event Horizon telescope arrays, but instead imprint themselves in horizon-scale images as excess central brightness relative to that of a black hole. We demonstrate that future arrays can detect such indirect imprints.
