银河中心黑洞周围的涡状磁场

银河中心黑洞周围的涡状磁场

Swirling Magnetic Field around Our Galaxy’s Central Black Hole
Image Credit: EHT Collaboration

Explanation: 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 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.

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Tomorrow’s picture: corona-vision

银河中心黑洞周围的涡状磁场
影像提供: EHT Collaboration

说明: 银河中心的大黑洞发生了什么事？它正在吸取一个涡状盘里的物质，而这个盘己确定受到磁化。具体来说，最近发现银河黑洞的吸积盘会发出偏振光，而这种型态的辐射通常与磁化源有关。这张图为银河中心黑洞人马座A*（Sgr A*）的特写，而此图是由世界各地参与事件视界望远镜（EHT）合作计划的射电望远镜所拍摄的。图上叠加的示意曲线，显示偏振光可能是由涡状的磁化气体所发出的，而这些气体即将掉进这颗质量超过4百万倍太阳的中心黑洞里。这张影像的中心区之所以很黝黑，可能是因为我们与黑洞的黝黑事件视界之间，几乎没有发光的气体所致。使用事件视界望远镜对这个黑洞及M87中心黑洞进行长期监测，或许能取得黑洞的重力及掉入的物质如何产生吸积盘和喷流之新线索。

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明日的图片: corona-vision