论文标题
在主要合并中形成禁止的银河系：AGN反馈的作用
Formation of a barred galaxy in a major merger: The role of AGN feedback
论文作者
论文摘要
但是，在星系进化中涉及的许多过程中，有活跃银河核（AGN）的棒形成，淬火和反馈的过程似乎是连接的，但是，这些关系的性质尚不清楚。在这项工作中，我们的目的是通过研究插图模拟中两个磁盘的主要合并中的被禁止的星系的形成来阐明它们。这次合并涉及两个超级质量黑洞的结合，并突然切换到模拟中实现的AGN反馈模式，从而导致从星系内部去除气体，然后淬灭恒星形成和杆的形成。 AGN反馈和条形形成之间的这种因果关系解释了数据中观察到的许多相关性，例如红色螺旋中的杆频率较高以及禁止星系中的中央气孔的存在。在这样的图片中，条没有喂黑孔，因此它们的存在不会增加AGN强度，并且不会引起淬火。但是，在AGN反馈引起的低气分级数的区域中确实形成了条形。这种情况可能适用于许多禁止的星系，不仅是在主要合并中形成的星系。
Among the many processes involved in galaxy evolution, those of bar formation, quenching, and feedback from an active galactic nucleus (AGN) seem to be connected, however, the nature of these relations remains unclear. In this work, we aim to elucidate them by studying the formation of a barred galaxy in a major merger of two disks in the IllustrisTNG simulations. This merger involves a coalescence of two supermassive black holes and a sudden switch to the kinetic mode of AGN feedback implemented in the simulations, which leads to the removal of the gas from the inner part of the galaxy, followed by quenching of star formation and the formation of the bar. This causal relation between AGN feedback and bar formation explains a number of correlations observed in the data, such as the higher frequency of bars among red spirals and the presence of central gas holes in barred galaxies. In such a picture, the bars do not feed the black holes, so their presence does not increase the AGN strength, and they do not cause quenching. However, bars do form in regions characterized by a low gas fraction resulting from AGN feedback. This scenario is probably applicable to many barred galaxies, not only those formed in major mergers.
