Relativistic Outflow Magnetically Driven by Black Hole Rotation
Relativistic Outflow Magnetically Driven by Black Hole Rotation
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DOI：
10.1086/420976
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发表时间：
2004-03
期刊：
影响因子：
--
通讯作者：
S. Koide
中科院分区：
文献类型：
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作者：
S. Koide
在宇宙中，已经发现了几种相对论性喷流，人们认为它们是由黑洞附近的剧烈现象形成的。尽管观测和黑洞物理学取得了进步，但它们的加速机制仍然不为人所知。在这里，通过数值模拟，我们表明相对论流出是由快速旋转黑洞附近的磁场自发形成的。之前的模拟显示了黑洞磁层中的电磁能量发射和非相对论性流出的形成，但尚未获得实际的相对论性流出。目前的模拟表明，与穿过黑洞视界的旋转轴倾斜的磁通量管被扭曲成螺丝形状，并将黑洞周围的等离子体推进到相对论状态。
In the universe, several kinds of relativistic jets have been discovered, and it is believed that they are formed by violent phenomena near black holes. Despite the advancement of observations and black hole physics, their acceleration mechanisms are still not understood. Here, using numerical simulations, we show that the relativistic outflow is formed spontaneously by the magnetic field very near the rapidly rotating black hole. Previous simulations showed electromagnetic energy emission and nonrelativistic outflow formation in the black hole magnetosphere, but actual relativistic outflows have not yet been obtained. The present simulation shows that magnetic flux tubes, oblique to the rotation axis across the black hole horizon, are twisted into the shape of screws and propel plasma around the black hole to the relativistic regime.