开放型大尺度磁场对黑洞吸积盘过渡区能量的提取

Magnetic extraction of energy from transition region of black-hole accretion disk

在黑洞磁层理论的基础上,利用改进的等效电路方法推导出黑洞吸积盘过渡区的喷流功率的表达式(简称TL功率),并进一步比较TL与BZ、DL功率的相对重要性,结果表明:对于低自转黑洞,TL功率比BZ、DL功率明显占优势.此外,利用该文提出的模型获得的TL功率能很好地拟合两个3CRFRI射电星系的强喷流功率.

An analytical expression for the jet power extracted from the transition region between a black hole （BH） horizon and the inner edge of the disk （hereafter the TL power） was derived based on an improved equivalent circuit in BH magnetosphere. In addition, the relative importance of this TL power relative to the BZ and DL powers was discussed. It was shown that the TL power was of great importance in explaining jet power and dominates over the BZ and DL powers especially for the slow-spinning BH. Furthermore, we showed that the TL power derived in our model could be well fitted with the strong jet powers of two 3CR FR I radio galaxies.