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arXiv 2202.07246astro-ph.SR
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前行星状星云：双星与磁场如何产生喷流的原理、进展和问题的研究背景

Pre-planetary nebulae: a context for principles, progress, and questions on how binaries and magnetic fields produce jets

Eric G. Blackman

备注：
20 Pages, 4 figures; review published in the Proceedings of IAU Symposium 366: "The Origin of Outflows in Evolved Stars"; L. Decin, A.A. Zÿlstra and C. Gielen, editors; this version updated post-publication to include Corrigendum: minor typos to equations 2.1, 2.3, and 2.7 have been corrected herein
发表信息：
Pre-planetary nebulae: a context for principles, progress, and questions on how binaries and magnetic fields produce jets. Proceedings of the International Astronomical Union. 2020;16(S366):281-300
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AI总结：

本文以PPN为背景，综述双星相互作用通过吸积驱动喷流塑造非对称星云的两类机制，并讨论磁场作用与起源的关键问题。

摘要：

最初被视为球对称的天体物理外流，在更高分辨率下观测时往往显示出不对称性的证据。哈勃空间望远镜的大量观测表明，非球形和多极的行星状星云（PN）与前行星状星云（PPN）占绝大多数。长期以来，人们认为双星相互作用对于塑造不对称的PN/PPN至关重要，但其机制如何？PPN在两者中对运动学要求更高，值得特别关注。我论述了观测和理论的进展如何提示存在两大类吸积驱动的PPN喷流：一类适用于宽双星（PPN-W），伴星位于巨星外半径之外，并通过洛希瓣溢流进行吸积；另一类发生在密近双星（PPN-C）的共同包层演化（CEE）后期阶段。这些情景中的物理过程，关系到磁场在喷流引擎中以及更广泛天体物理喷流中的作用和起源方面的进展与开放问题。

英文摘要：

Astrophysical outflows treated initially as spherically symmetric often show evidence for asymmetry once seen at higher resolution. The preponderance of aspherical and multipolar planetary nebulae (PN) and pre-planetary nebulae (PPN) was evident after many observations from the Hubble Space Telescope. Binary interactions have long been thought to be essential for shaping asymmetric PN/PPN, but how? PPN are the more kinematically demanding of the two, and warrant particular focus. I address how progress from observation and theory suggests two broad classes of accretion driven PPN jets: one for wider binaries (PPN-W) where the companion is outside the outer radius of the giant and accretes via Roche lobe overflow, and the other which occurs in the later stages of common envelope evolution (CEE) for close binaries (PPN-C). The physics within these scenarios connects to progress and open questions about the role and origin of magnetic fields in the engines and in astrophysical jets more generally.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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