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首页> 外文期刊>The Astrophysical journal >Common Envelope Shaping of Planetary Nebulae. II. Magnetic Solutions and Self-collimated Outflows
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Common Envelope Shaping of Planetary Nebulae. II. Magnetic Solutions and Self-collimated Outflows

机译：行星星云的共同包络塑造。 II。 磁性解决方案和自我准直的流出

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摘要

Magnetic fields of order 10~(1)–10~(2) Gauss that are present in the envelopes of red giant stars are ejected in common envelope scenarios. These fields could be responsible for the launching of magnetically driven winds in protoplanetary nebulae. Using 2D simulations of magnetized winds interacting with an envelope drawn from a 3D simulation of the common envelope phase, we study the confinement, heating, and magnetic field development of post-common envelope winds. We find that the ejected magnetic field can be enhanced via compression by factors up to ～10~(4) in circumbinary disks during the self-regulated phases. We find values for the kinetic energy of the order of 10~(46) erg that explain the large values inferred in protoplanetary nebula outflows. We show that the interaction of the formed circumbinary disk with a spherical, stellar wind produces a "tapered" flow that is almost indistinguishable from an imposed tapered flow. This increases the uncertainty of the origin of protoplanetary nebula winds, which could be either stellar, circumstellar (stellar accretion disk), circumbinary (circumbinary accretion disk), or a combination of all three. Within this framework, a scenario for self-collimation of weakly magnetized winds is discussed, which can explain the two objects where the collimation process is observationally resolved, HD 101584 and Hen 3-1475. An explanation for the equatorial, molecular hydrogen emission in CRL 2688 is also presented.
机译：磁场10〜（1）-10〜（2）在红巨星信封中存在的高斯以共同的信封情景喷射。这些领域可能负责在原文象星云中发射磁驱动风。使用磁化风的2D模拟与来自共同包络相3D模拟的信封相互作用，我们研究了常见的包络风的约束，加热和磁场开发。我们发现，通过在自调节阶段期间，通过压缩通过压缩通过压缩来增强喷射的磁场。我们发现了10〜（46）erg的动能的值，以解释原文象星云外流中推断的大值。我们表明，形成的径向圆盘与球形的相互作用，产生“锥形”流，几乎与施加的锥形流动难以区分。这增加了原始星云风的起源的不确定性，这可能是恒星，周教室（恒星增压盘），循环（圆形增液盘）或所有三个的组合。在该框架内，讨论了用于弱磁化风的自直准直的场景，其可以解释准直过程的两种物体，其中准直过程HD 101584和HEN 3-1475。还介绍了CRL 2688中赤道的分子氢发射的解释。

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