3C 75中的两个黑洞在跳舞
(原标题: Two Black Holes Dancing in 3C 75)
2022-06-05
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在活动星系3C 75的中心发生了什么？这张x射线（蓝色）/射电（粉红色）复合图像中心的两个明亮光源是共轨超大质量黑洞，为巨大的射电源3C 75提供动力。被数百万度的x射线辐射气体包围，并喷出相对论粒子射流，超大质量黑洞相隔25000光年。在Abell 400星系团中两个合并星系的核心，它们距离我们大约3亿光年。天文学家得出结论，这两个超大质量黑洞在一个双星系统中被引力束缚在一起，部分原因是喷流一致的向后扫的外观很可能是由于它们以每秒1200公里的速度穿过炽热的星团气体时的共同运动。这种壮观的宇宙合并被认为在遥远宇宙中拥挤的星系团环境中很常见。在它们的最后阶段，合并预计会成为引力波的强烈来源。
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What's happening at the center of active galaxy 3C 75? The two bright sources at the center of this composite x-ray (blue)/ radio (pink) image are co-orbiting supermassive black holes powering the giant radio source 3C 75. Surrounded by multimillion degree x-ray emitting gas, and blasting out jets of relativistic particles the supermassive black holes are separated by 25,000 light-years. At the cores of two merging galaxies in the Abell 400 galaxy cluster they are some 300 million light-years away. Astronomers conclude that these two supermassive black holes are bound together by gravity in a binary system in part because the jets' consistent swept back appearance is most likely due to their common motion as they speed through the hot cluster gas at about 1200 kilometers per second. Such spectacular cosmic mergers are thought to be common in crowded galaxy cluster environments in the distant universe. In their final stages, the mergers are expected to be intense sources of gravitational waves.