银河系中心黑洞周围的旋转磁场
(原标题: Swirling Magnetic Field around Our Galaxy's Central Black Hole)
2024-04-01
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我们银河系中心的大黑洞发生了什么？它正在从一个旋转的圆盘中吸收物质——这个圆盘是磁化的，现在已经被证实了。具体来说，黑洞的吸积盘最近被发现发出偏振光，这种辐射通常与磁化源有关。这是我们银河系中心黑洞Sgr a *的特写，由世界各地参与事件视界望远镜（EHT）合作的射电望远镜拍摄。叠加在一起的图解曲线表明，偏振光很可能是由旋转磁化气体发出的，这些气体很快就会落入这个质量为400多万太阳质量的中央黑洞。这幅图像的中心部分很可能是黑暗的，因为在我们和黑洞的黑暗视界之间几乎看不到发光气体。对这个黑洞和M87中心黑洞的持续EHT监测可能会为黑洞的引力以及物质如何形成圆盘和喷流提供新的线索。美国宇航局预测：月球将挡住太阳
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What's happening to the big black hole in the center of our galaxy? It is sucking in matter from a swirling disk -- a disk that is magnetized, it has now been confirmed. Specifically, the black hole's accretion disk has recently been seen to emit polarized light, radiation frequently associated with a magnetized source. Pictured here is a close-up of Sgr A*, our Galaxy's central black hole, taken by radio telescopes around the world participating in the Event Horizon Telescope (EHT) Collaboration. Superposed are illustrative curved lines indicating polarized light likely emitted from swirling magnetized gas that will soon fall into the 4+ million solar mass central black hole. The central part of this image is likely dark because little light-emitting gas is visible between us and the dark event horizon of the black hole. Continued EHT monitoring of this and M87's central black hole may yield new clues about the gravity of black holes and how infalling matter creates disks and jets. NASA Predicts: Moon to Get in Way of Sun