Magnetic Driving of Relativistic Outflows in Active Galactic Nuclei. I. Interpretation of Parsec-Scale Accelerations
Magnetic Driving of Relativistic Outflows in Active Galactic Nuclei. I. Interpretation of Parsec-Scale Accelerations
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DOI：
10.1086/382670
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发表时间：
2003-10
期刊：
影响因子：
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通讯作者：
N. Vlahakis;A. Königl
中科院分区：
文献类型：
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作者：
N. Vlahakis;A. Königl
越来越多的证据表明，活动星系核中的相对论喷流经历了扩展（秒差距尺度）的加速。我们认为，与文献中的一些建议相反，这种加速度不能是纯粹的流体动力学。使用精确的相对论MHD方程的半解析解，我们证明了在射电星系NGC 6251和类星体3C 345等源中推断的相对论速度的秒差距尺度加速可以归因于磁驱动。该模型的其他观测意义将在本系列的未来论文中进行探讨。
There is growing evidence that relativistic jets in active galactic nuclei undergo extended (parsec-scale) acceleration. We argue that, contrary to some suggestions in the literature, this acceleration cannot be purely hydrodynamic. Using exact semianalytic solutions of the relativistic MHD equations, we demonstrate that the parsec-scale acceleration to relativistic speeds inferred in sources such as the radio galaxy NGC 6251 and the quasar 3C 345 can be attributed to magnetic driving. Additional observational implications of this model will be explored in future papers in this series.