定量ULIRGs（QUADROS）中活动星系核驱动的外流II：来自HST [ OIII ]成像观测的致密外流区的证据
Quantifying the AGN-driven outflows in ULIRGs (QUADROS) II: evidence for compact outflow regions from HST [OIII] imaging observations
摘要：
活动星系核驱动的温暖外流对星系演化的真正重要性仍然不确定。外流的径向范围的测量是量化其质量和动力学功率的关键，也是确定活动星系核外流是否是银河系范围的关键。因此，作为一个更大的项目的一部分，调查温暖的意义，活动星系核驱动的外流在最迅速演变的星系在当地的宇宙，在这里，我们提出了深哈勃太空望远镜（HST）窄带[OIII] $λ$ 5007观测的一个完整的样本附近的8个ULIRGs与光学活动星系核。结合我们的地基光谱提供的补充信息，HST图像显示，样品中大多数物体的温暖气体流出相对紧凑：在三个物体中，流出区域几乎不能在HST分辨率下分辨（$0.065 < R_{[OIII]} < 0.12$ kpc）;在另外四种情况下，流出是空间分辨的，但具有在$0.65 < R_{[OIII]} < 1.2$ kpc范围内的通量加权平均半径;只有一个天体（Mrk 273）有明显的证据表明有更大范围的外流，最大范围为$R_{[OIII]}\sim5$ kpc。总的来说，我们的观测结果表明，一些AGN反馈模型预测的星系范围的外流证据很少。
英文摘要：
The true importance of the warm, AGN-driven outflows for the evolution of galaxies remains uncertain. Measurements of the radial extents of the outflows are key for quantifying their masses and kinetic powers, and also establishing whether the AGN outflows are galaxy-wide. Therefore, as part of a larger project to investigate the significance of warm, AGN-driven outflows in the most rapidly evolving galaxies in the local universe, here we present deep Hubble Space Telescope ( HST) narrow-band [OIII]$λ$5007 observations of a complete sample of 8 nearby ULIRGs with optical AGN nuclei. Combined with the complementary information provided by our ground-based spectroscopy, the HST images show that the warm gas outflows are relatively compact for most of the objects in the sample: in three objects the outflow regions are barely resolved at the resolution of HST ($0.065 < R_{[OIII]} < 0.12$ kpc); in a further four cases the outflows are spatially resolved but with flux weighted mean radii in the range $0.65 < R_{[OIII]} < 1.2$ kpc; and in only one object (Mrk273) is there clear evidence for a more extended outflow, with a maximum extent of $R_{[OIII]}\sim5$ kpc. Overall, our observations show little evidence for the galaxy-wide outflows predicted by some models of AGN feedback.
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