论文标题
黑洞的可见形状M87*和SGRA*
Visible shapes of black holes M87* and SgrA*
论文作者
论文摘要
我们回顾了物理起源，以了解银河系中的Galaxy M87和Sgra*中的超质量黑洞M87*的可见图像。在超过所谓的光子球的距离后面的黑洞后面的发光背景后，可见的是最大尺寸的经典深色黑洞阴影。如果黑洞在光子球内的发光物质的内部突出显示，则可以看到黑洞事件的较小的深色阴影（深色剪影）。由事件地平线望远镜合作获得的超质量黑洞M87 *的第一张图像显示了黑洞事件地平线的南半球的镜头黑暗图像，以积聚的物质强调，而古典黑洞的阴影几乎是看不见的。事件地平线望远镜（EHT）图像中的黑点大小与薄的积聚磁盘模型中的黑暗事件式轮廓的相应大小相符，而黑洞旋转的高值或中等值，$ a \ gtrsim0.75 $。
We review the physical origins for possible visible images of the supermassive black hole M87* in the galaxy M87 and SgrA* in the Milky Way Galaxy. The classical dark black hole shadow of the maximal size is visible in the case of luminous background behind the black hole at the distance exceeding the so-called photon spheres. The notably smaller dark shadow (dark silhouette) of the black hole event horizon is visible if the black hole is highlighted by the inner parts of the luminous accreting matter inside the photon spheres. The first image of the supermassive black hole M87 *, obtained by the Event Horizon Telescope collaboration, shows the lensed dark image of the southern hemisphere of the black hole event horizon globe, highlighted by accreting matter, while the classical black hole shadow is invisible at all. A size of the dark spot on the Event Horizon Telescope (EHT) image agrees with a corresponding size of the dark event horizon silhouette in a thin accretion disk model in the case of either the high or moderate value of the black hole spin, $a\gtrsim0.75$.
