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arXiv 1209.0168astro-ph.SRastro-ph.GAastro-ph.HE
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喷流反馈机制（JFM）：从超新星到星系团

The jet feedback mechanism (JFM): from supernovae to clusters of galaxies

Noam Soker, Muhammad Akashi, Avishai Gilkis, Shlomi Hillel, Oded Papish, Michael Refaelovich, Danny Tsebrenko

备注：
An extended version of a paper submitted to the proceedings of Galaxy Clusters as Giant Cosmic Laboratories (ESAC, Madrid, Spain 21st - 23rd May 2012) to be published at Astronomische Nachrichten
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摘要：

我们使用二维和三维流体动力学数值模拟研究了几个完全不同的天体物理系统中喷流-介质相互作用的相似性，发现了许多相似之处。这些系统包括冷却流（CF）星系团，核心坍缩超新星（CCSNe），行星状星云（PNe）和共同包络（CE）演化。相似之处包括由双极结构中的射流膨胀的热气泡、射流侧面的涡流、膨胀气泡内部的涡流、气泡破碎成两个或更多个气泡以及气泡的浮力。在许多情况下，这种活动受到负反馈机制的调节。也就是说，更高的吸积速率导致更强的喷流活动，反过来抑制吸积过程。在喷流功率降低后，吸积恢复，循环重新开始。在星系和星系团中CF的情况下，我们还研究了吸积过程，这很可能是通过冷团块，即，冷反馈机制在CF团簇中，我们发现团簇内介质（ICM）的加热是通过热冲击射流气体与ICM的混合来完成的，而不是通过冲击。我们的研究结果加强了喷流反馈机制（JFM）作为一个共同的过程，在许多天体物理对象。

英文摘要：

We study the similarities of jet-medium interactions in several quite different astrophysical systems using 2D and 3D hydrodynamical numerical simulations, and find many similarities. The systems include cooling flow (CF) clusters of galaxies, core-collapse supernovae (CCSNe), planetary nebulae (PNe), and common envelope (CE) evolution. The similarities include hot bubbles inflated by jets in a bipolar structure, vortices on the sides of the jets, vortices inside the inflated bubbles, fragmentation of bubbles to two and more bubbles, and buoyancy of bubbles. The activity in many cases is regulated by a negative feedback mechanism. Namely, higher accretion rate leads to stronger jet activity that in turn suppresses the accretion process. After the jets power decreases the accretion resumes, and the cycle restarts. In the case of CF in galaxies and clusters of galaxies we also study the accretion process, which is most likely by cold clumps, i.e., the cold feedback mechanism. In CF clusters we find that heating of the intra-cluster medium (ICM) is done by mixing hot shocked jet gas with the ICM, and not by shocks. Our results strengthen the jet feedback mechanism (JFM) as a common process in many astrophysical objects.

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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