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arXiv 1902.07560astro-ph.GA
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揭开活动星系核驱动外流的复杂结构:IV。有和没有强外流的活动星系核的比较

Unraveling the complex structure of AGN-driven outflows: IV. Comparing AGNs with and without strong outflows

Rongxin Luo, Jong-Hak Woo, Jaejin Shin, Daeun Kang, Hyun-Jin Bae, Marios Karouzos

摘要:

活动星系核驱动的外流被认为是驱动超大质量黑洞与宿主星系共同演化的过程之一。我们给出了6个z < 0.1的2型活动星系核的积分场谱,这些活动星系核是根据[Oiii]气体的运动学被选为没有强流出的活动星系核。利用空间分辨数据,我们研究了电离气体的运动学和光电离特性与活动星系核的强外流。我们发现两个活动星系核的电离气体和恒星的运动学之间的显着差异,这表明活动星系核驱动的外流的存在。然而,电离气体的低速和速度色散表明这些活动星系核中的外流相对较弱。我们的研究结果强调了空间分辨观测在研究气体运动学和识别活动星系核驱动外流特征方面的重要性。虽然目前还不清楚是什么决定了外流的发生,我们讨论了活动星系核驱动的外流的条件和可探测性的基础上,一个更大的样本活动星系核和没有外流,这表明在宿主星系的气体含量的重要性。

英文摘要:

AGN-driven outflows are considered as one of the processes driving the co-evolution of supermassive black holes with their host galaxies. We present integral field spectroscopy of six Type 2 AGNs at z < 0.1, which are selected as AGNs without strong outflows based on the kinematics of [Oiii] gas. Using spatially resolved data, we investigate the ionized gas kinematics and photoionization properties in comparison with AGNs with strong outflows. We find significant differences between the kinematics of ionized gas and stars for two AGNs, which indicates the presence of AGN-driven outflows. Nevertheless, the low velocity and velocity dispersion of ionized gas indicate relatively weak outflows in these AGNs. Our results highlight the importance of spatially-resolved observation in investigating gas kinematics and identifying the signatures of AGN-driven outflows. While it is unclear what determines the occurrence of outflows, we discuss the conditions and detectability of AGN-driven outflows based on a larger sample of AGNs with and without outflows, suggesting the importance of gas content in the host galaxies.

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