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The jet feedback mechanism (JFM) in stars, galaxies and clusters
New Astronomy Reviews ( IF 11.7 ) Pub Date : 2016-12-01 , DOI: 10.1016/j.newar.2016.08.002
Noam Soker

I review the influence jets and the bubbles they inflate might have on their ambient gas as they operate through a negative jet feedback mechanism (JFM). I discuss astrophysical systems where jets are observed to influence the ambient gas, in many cases by inflating large, hot, and low-density bubbles, and systems where the operation of the JFM is still a theoretical suggestion. The first group includes cooling flows in galaxies and clusters of galaxies, star-forming galaxies, young stellar objects, and bipolar planetary nebulae. The second group includes core collapse supernovae, the common envelope evolution, the grazing envelope evolution, and intermediate luminosity optical transients. The suggestion that the JFM operates in these four types of systems is based on the assumption that jets are much more common than what is inferred from objects where they are directly observed. Common to all eight types of systems reviewed here is the presence of a compact object inside an extended ambient gas. The ambient gas serves as a potential reservoir of mass to be accreted on to the compact object. If the compact object launches jets as it accretes mass, the jets might reduce the accretion rate as they deposit energy to the ambient gas, or even remove the entire ambient gas, hence closing a negative feedback cycle.

中文翻译:

恒星、星系和星团中的喷射反馈机制 (JFM)

我回顾了喷射流和它们膨胀的气泡在它们通过负喷射反馈机制 (JFM) 运行时可能对其周围气体产生的影响。我讨论了天体物理系统,其中观察到喷流会影响环境气体,在许多情况下是通过膨胀大的、热的和低密度的气泡,以及 JFM 的运行仍然是一个理论建议的系统。第一组包括星系和星系团、恒星形成星系、年轻恒星物体和双极行星状星云中的冷却流。第二组包括核心坍缩超新星、普通包络演化、掠食包络演化和中间光度光学瞬变。JFM 在这四种类型的系统中运行的建议是基于这样的假设,即喷流比从直接观察到的物体推断出的喷流更常见。此处审查的所有八种类型的系统的共同点是在扩展的环境气体中存在一个紧凑的物体。环境气体作为潜在的质量储存器,被吸积到致密物体上。如果紧凑物体在吸积质量时发射射流,射流可能会降低吸积率,因为它们将能量沉积到环境气体中,甚至去除整个环境气体,从而关闭负反馈循环。环境气体作为潜在的质量储存器,被吸积到致密物体上。如果紧凑物体在吸积质量时发射射流,射流可能会降低吸积率,因为它们将能量沉积到环境气体中,甚至去除整个环境气体,从而关闭负反馈循环。环境气体作为潜在的质量储存器,被吸积到致密物体上。如果紧凑物体在吸积质量时发射射流,射流可能会降低吸积率,因为它们将能量沉积到环境气体中,甚至去除整个环境气体,从而关闭负反馈循环。
更新日期:2016-12-01
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