黑洞本身不发光，但其强引力与高速旋转使周围吸积盘成为能量释放的工厂。
盘内物质在强剪切与磁场作用下发生磁重联和电磁能量转换，部分能量沿极轴以相对论性喷流形式释放。
Blandford–Znajek机制描述从自转黑洞中直接提取旋转能，结合吸积盘磁场可驱动高功率喷流。
喷流内的冲击波、湍流与磁重联可把电子与质子加速到接近光速，产生射电、X射线与伽马射线辐射，甚至贡献超高能宇宙射线来源。
短时剧烈事件如伽马射线暴和并合后形成的新生黑洞也显示出极高的加速效率。
通过多信使天文学（电磁波、中微子、引力波）和更高分辨率的观测，天文学家正逐步揭示黑洞加速的细节及其在星系演化和宇宙能量循环中的作用。
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