Lupsasca Alexandru, Kapec Daniel, Shi Yichen, Gates Delilah E A, Strominger Andrew
Center for the Fundamental Laws of Nature, Harvard University, Cambridge, MA 02138, USA.
Society of Fellows, Harvard University, Cambridge, MA 02138, USA.
Proc Math Phys Eng Sci. 2020 May;476(2237):20190618. doi: 10.1098/rspa.2019.0618. Epub 2020 May 27.
The event horizon telescope (EHT) is expected to soon produce polarimetric images of the supermassive black hole at the centre of the neighbouring galaxy M87. There are indications that this black hole is rapidly spinning. General relativity predicts that such a high-spin black hole has an emergent conformal symmetry near its event horizon. In this paper, we use this symmetry to analytically predict the polarized near-horizon emissions to be seen at the EHT and find a distinctive pattern of whorls aligned with the spin.
事件视界望远镜（EHT）预计很快将生成邻近星系M87中心超大质量黑洞的偏振图像。有迹象表明，这个黑洞正在快速旋转。广义相对论预测，这样一个高自旋黑洞在其事件视界附近具有一种涌现的共形对称性。在本文中，我们利用这种对称性来分析预测在EHT上将会看到的近视界偏振辐射，并发现一种与自旋方向一致的独特涡旋图案。
