塞弗特2星系活动星系核的反馈

E. Zhang, W. Bian, Chen Hu, Wei Mao, A. Luo, Yongheng Zhao
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引用次数: 0

摘要

来自活动星系核(agn)的反馈在超大质量黑洞(SMBH)及其宿主星系的共同演化中起着重要作用,但反馈的具体机制尚不清楚。大量证据表明,AGN反馈抑制了宿主星系中的恒星形成。我们收集了Seyfert 2星系的样本和最近的致密核星暴观测数据,并估计了气体表面密度作为柱密度的函数,以阐明反馈与AGN性质之间的关系。虽然存在一些不确定性,但我们的数据仍然暗示了对恒星形成定律(kennicut - schmidt定律)的偏离。此外,他们指出:(1)反馈与Eddington比相关,而不是与SMBH的质量相关,这是由于恒星形成效率降低的结果。(2) SMBH和环面可能正在共同演化。本文提出的结论可以通过未来的高分辨率CO或HCN观测加以完善。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Feedback of Active Galactic Nuclei in Seyfert 2 Galaxies
It is well accepted that feedback from active galactic nuclei (AGNs) plays an important role in the coevolution of the supermassive black hole (SMBH) and its host galaxy, but the concrete mechanism of feedback remains unclear. A considerable body of evidence suggests that AGN feedback suppresses star formation in the host galaxy. We assemble a sample of Seyfert 2 galaxies with recent observational data of compact nuclear starbursts and estimate the gas surface density as a function of column density to illuminate the relation between feedback and AGN properties. Although there are some uncertainties, our data still imply the deviation from the star formation law (Kennicutt-Schmidt law). Further, they indicate that: (1) Feedback correlates with the Eddington ratio, rather than with the mass of SMBH, as a result of decreasing star formation efficiency. (2) The SMBH and the torus are probably undergoing coevolution. Conclusions presented here can be refined through future high resolution CO or HCN observations.
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