椭圆星系活动星系核反馈的数值研究{ \it MACER }
Numerical study of active galactic nucleus feedback in an elliptical galaxy with {\it MACER}
摘要：
本文总结了我们最近通过高分辨率流体动力学数值模拟研究孤立椭圆星系活动星系核反馈的工作。求解了Bondi半径，计算了黑洞的质量吸积率。采用了最新的活动星系核物理，即冷吸积模和热吸积模的区分，以及在给定吸积率下活动星系核辐射和风的精确描述，并计算了它们与宿主星系气体的相互作用。物理过程，如恒星的形成和SNe反馈考虑在内。与观测结果一致，我们发现活动星系核大部分时间处于低光度区。活动星系核反馈总体上抑制了恒星的形成，但根据在星系中的位置和时间，它也可以增强恒星的形成，特定恒星形成速率的光变曲线与活动星系核光变曲线并不同步。我们发现风在控制活动星系核的光度和恒星形成中起着主导作用，但辐射也不能忽略。
英文摘要：
This paper summarizes our recent works of studying AGN feedback in an isolated elliptical galaxy by performing high-resolution hydrodynamical numerical simulations. Bondi radius is resolved and the mass accretion rate of the black hole is calculated. The most updated AGN physics, namely the discrimination of cold and hot accretion modes and the exact descriptions of the AGN radiation and wind for a given accretion rate are adopted and their interaction with the gas in the host galaxy is calculated. Physical processes such as star formation and SNe feedback are taken into account. Consistent with observation, we find the AGN spends most of the time in the low-luminosity regime. AGN feedback overall suppresses the star formation; but depending on location in the galaxy and time, it can also enhance it. The light curve of specific star formation rate is not synchronous with the AGN light curve. We find that wind usually plays a dominant role in controlling the AGN luminosity and star formation, but radiation also cannot be neglected.
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