银河系的黑洞
(原标题: The Milky Way's Black Hole)
2022-05-13
浏览次数: 17
银河系的中心有一个黑洞。人们观察到，恒星围绕着一个非常大而致密的物体运行，这个物体被称为Sgr a *（也叫“Sgr -ay-star”）。但这张刚刚发布的来自地球事件视界望远镜的射电图像（插图）是银河系中心黑洞的第一个直接证据。正如爱因斯坦的广义相对论所预测的那样，这个质量为400万太阳的黑洞的强大引力使光线弯曲，并在明亮的环状结构周围形成一个阴影状的黑暗中心区域。天基望远镜和地面天文台的辅助观测为银河系中心的动态环境提供了更广阔的视野，并为事件视界望远镜的黑洞图像提供了重要的背景。主面板图像显示了来自钱德拉的x射线数据和哈勃望远镜的红外数据。虽然主面板的宽度约为7光年，但事件视界望远镜插入的图像本身在我们银河系中心的跨度仅为10光分，距离我们约2.7万光年。
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There's a black hole at the center of the Milky Way. Stars are observed to orbit a very massive and compact object there known as Sgr A* (say "sadge-ay-star"). But this just released radio image (inset) from planet Earth's Event Horizon Telescope is the first direct evidence of the Milky Way's central black hole. As predicted by Einstein's Theory of General Relativity, the four million solar mass black hole's strong gravity is bending light and creating a shadow-like dark central region surrounded by a bright ring-like structure. Supporting observations made by space-based telescopes and ground-based observatories provide a wider view of the galactic center's dynamic environment and an important context for the Event Horizon Telescope's black hole image. The main panel image shows the X-ray data from Chandra and infrared data from Hubble. While the main panel is about 7 light-years across, the Event Horizon Telescope inset image itself spans a mere 10 light-minutes at the center of our galaxy, some 27,000 light-years away.