黑洞并非只吞噬物质，它们也是强大的加速器。
围绕快速自转黑洞的吸积盘中，磁场被绕扭并通过布兰福德—扎伊克机制抽取自转能量，产生相对论喷流，把等离子体加速到接近光速；在黑洞赤道外的旋转能量带（机翼区）内，佩纳罗斯过程允许物质分解，部分碎片获得能量逃逸，从而实现能量提取。
靠近黑洞的天体也可经历引力弹弓效应，被强引力场重定向并加速。
双黑洞合并时，非对称引力波发射会给合并体“反冲”，产生高速运动的黑洞。
上述加速现象是活动星系核喷流、高能宇宙线及快速射电暴等高能天体活动的源头之一。
通过射电望远镜、伽马射线望远镜、引力波探测器与中微子观测的联合研究，我们正逐步揭示黑洞如何在宇宙尺度上充当能量转换与加速的核心引擎。
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