Quantifying the AGN-driven outflows in ULIRGs (QUADROS) - I : VLT/Xshooter observations of nine nearby objects
Quantifying the AGN-driven outflows in ULIRGs (QUADROS) - I : VLT/Xshooter observations of nine nearby objects
复制标题
量化 ULIRG (QUADROS) 中 AGN 驱动的流出 - I：VLT/Xshooter 对 9 个附近物体的观测
DOI：
10.1093/mnras/stx2590
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发表时间：
2017
影响因子：
4.8
通讯作者：
R. Spence
中科院分区：
文献类型：
--
作者：
M. Rose;C. Tadhunter;C. R. Almeida;J. Zaurin;F. Santoro;R. Spence
虽然现在经常纳入星系演化的流体动力学模拟，活动星系核（AGN）驱动的外流的反馈效应的真正重要性仍然不确定从观测的角度来看。这是由于缺乏关于外流区域的密度、径向尺度和尘埃消失程度的准确信息。在这里，我们使用VLT/Xshooter的独特功能来研究具有代表性的9个局部（0.06 <z <0.15）超铝红外线星系（ULIRGs）样本中的温暖外流，并首次准确地量化关键的外流特性。我们发现流出物是致密的（0.06 <R-[O III] <1.2 kpc），明显的红化（中值E（B - V）接近0.5等），并具有相对高的电子密度（3.4 <log（10）n（e）（cm（-3））<4.8）。值得注意的是，后者的密度-获得使用trans-auroral [S II]和[O II]的发射线比-超过那些通常假设的温暖，在活跃的星系的发射线流出，但类似于宽和窄的吸收线流出系统中检测到的一些类型1活动星系核的估计。即使我们对真实的（非投影的）流出速度做出最乐观的假设，我们也会发现相对适度的质量流出率（0.07 <M）。<14米圈点年（-1））和作为活动星系核辐射热光度的一部分测量的动力学功率（4x 10（-4）</L-BOL <0.8%）。因此，虽然温暖，活动星系核驱动的外流有可能强烈影响附近ULIRG的内部隆起区域（r类似于1千秒差距）的星星形成历史，我们缺乏证据表明，它们对这些快速发展的系统在更大的尺度上的演变有显着的影响。
Although now routinely incorporated into hydrodynamic simulations of galaxy evolution, the true importance of the feedback effect of the outflows driven by active galactic nuclei (AGNs) remains uncertain from an observational perspective. This is due to a lack of accurate information on the densities, radial scales and level of dust extinction of the outflow regions. Here we use the unique capabilities of VLT/Xshooter to investigate the warm outflows in a representative sample of nine local (0.06 <z <0.15) Ultraluminous Infrared Galaxies (ULIRGs) with AGNs and, for the first time, accurately quantify the key outflow properties. We find that the outflows are compact (0.06 <R-[O III] <1.2 kpc), significantly reddened (median E(B - V) similar to 0.5magnitudes), and have relatively high electron densities (3.4 <log(10) n(e) (cm(-3)) <4.8). It is notable that the latter densities - obtained using trans-auroral [S II] and [O II] emission-line ratios - exceed those typically assumed for the warm, emission-line outflows in active galaxies, but are similar to those estimated for broad and narrow absorption line outflow systems detected in some type 1 AGN. Even if we make the most optimistic assumptions about the true (deprojected) outflow velocities, we find relatively modest mass outflow rates (0.07 <M. <14 M-circle dot yr(-1)) and kinetic powers measured as a fraction of the AGN bolometric luminosities (4 x 10(-4) </L-BOL <0.8 per cent). Therefore, although warm, AGN-driven outflows have the potential to strongly affect the star formation histories in the inner bulge regions (r similar to 1 kpc) of nearby ULIRGs, we lack evidence that they have a significant impact on the evolution of these rapidly evolving systems on larger scales.
2 型类星体中 AGN 反馈的红外视图：以茶杯星系为例
DOI：
10.48550/arxiv.1705.07631
发表时间：
2017
期刊：
--
影响因子：
--
作者：
Almeida C
通讯作者：
Almeida C