标题： 天体喷流的自准直和磁场产生 显示英文标题

标题： Self-Collimation and Magnetic Field Generation of Astrophysical Jets

摘要： 提出了一种新的电子-正电子-离子喷流准直与传输模型。分析结果表明，纤维状结构可以由渗透纤维的自感应环形磁场维持，在正电子主导区域其宽度显著扩展。磁场强度反映了喷流剩余动能均衡的一个特征。还表明管状不稳定性增长受到强烈抑制。该模型得出的基本特性与最近使用甚长基线望远镜观测到的结果一致。 显示英文摘要

摘要： A novel model for collimation and transport of electron-positron-ion jets is presented. Analytical results show that the filamentary structures can be sustained by self-induced toroidal magnetic fields permeating through the filaments, whose widths significantly expand in the pair-dominant regimes. The magnetic field strength reflects a characteristic of equipartition of excess kinetic energy of the jets. It is also shown that growth of the hoselike instability is strongly suppressed. Essential features derived from this model are consistent with recent results observed by using very long baseline telescopes.