AI 中文总结
该研究通过三维磁流体力学模拟，探究多物种等离子体对低功率磁化超声速喷流的影响，发现非轴对称不稳定性增长是破坏喷流头部的关键，明确了等离子体组成对FR射电喷流二分法的作用。
AI 中文摘要
河外射电喷流中观测到的Fanaroff-Riley（FR）二分法被归因于多种可能的机制，包括等离子体中不同物种的存在等喷流固有属性。喷流物质可能涵盖从纯正负电子对等离子体，到包含电子、正电子和质子的混合等离子体，甚至仅由电子和质子组成的强子喷流。为探究这一问题，我们在磁流体力学框架下开展了千秒差距尺度的低功率、超声速、磁化喷流三维模拟。通过改变等离子体组成，我们展示了其对喷流稳定性以及核心增亮型FR I源典型弥散结构发展的影响。结果表明，非轴对称不稳定性的增长在破坏喷流头部过程中起着关键作用。
英文摘要
The Fanaroff-Riley (FR) dichotomy observed in extragalactic radio jets has been attributed to a range of possible mechanisms, including intrinsic jet properties such as the presence of different species in the plasma. Jet material may span from a pure electron-positron pair plasma to mixed plasmas containing electrons, positrons, and protons, or even to hadronic jets made up of electrons and protons only. To investigate this aspect, we present results from three-dimensional simulations of low-power, supersonic, magnetized jets at kiloparsec scales in a magnetohydrodynamic framework. By varying the plasma composition, we show its impact on jet stability and on the development of diffuse structures typical of core-brightened FR type I sources. Our results indicate that the growth of non-axisymmetric instabilities plays a key role in disrupting the jet head.
Comments11 pages, 5 figures. Accepted for publication in the Bulletin of the Liège Royal Society of Sciences as a part of 4th BINA workshop, November 2025
