EHT解析半人马座A黑洞中心喷流
(原标题: EHT Resolves Central Jet from Black Hole in Cen A)
2021-08-04
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超大质量黑洞如何产生强大的喷流？为了帮助找到答案，事件视界望远镜（EHT）拍摄了附近活动星系半人马座A的中心。一系列特色的插入图像显示了半人马座A从最大的，比许多卫星都要多的天空，到现在最好的，只占月球上高尔夫球的天空。这张新图片显示的可能看起来像两架喷气式飞机，但实际上是一架喷气式飞机的两面。这个新发现的喷流边缘变亮并不能解决喷流形成之谜，但确实意味着粒子流出受到强大压力的限制——可能涉及磁场。EHT是来自地球各地的射电望远镜的协调-从美国夏威夷的加州理工学院亚毫米天文台到智利的ALMA，再到法国的NOEMA等等。EHT将继续观测附近的大质量黑洞及其充满能量的环境。
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How do supermassive black holes create powerful jets? To help find out, the Event Horizon Telescope (EHT) imaged the center of the nearby active galaxy Centaurus A. The cascade of featured inset images shows Cen A from it largest, taking up more sky than many moons, to its now finest, taking up only as much sky as an golf ball on the moon. The new image shows what may look like two jets -- but is actually two sides of a single jet. This newly discovered jet-edge brightening does not solve the jet-creation mystery, but does imply that the particle outflow is confined by a strong pressure -- possibly involving a magnetic field. The EHT is a coordination of radio telescopes from around the Earth -- from the Caltech Submillimeter Observatory in Hawaii USA, to ALMA in Chile, to NOEMA in France, and more. The EHT will continue to observe massive, nearby black holes and their energetic surroundings.