The Close AGN Reference Survey (CARS)
The Close AGN Reference Survey (CARS)
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DOI：
10.1051/0004-6361/201833424
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发表时间：
2018-07
影响因子：
6.5
通讯作者：
M. Powell;B. Husemann;G. Tremblay;M. Krumpe;T. Urrutia;S. Baum;G. Busch;F. Combes;S. Croom;T. Davis;A. Eckart;C. O’Dea;M. Pérez-Torres;J. Scharwächter;I. Smirnova-Pinchukova;C. M. Urry
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作者：
M. Powell;B. Husemann;G. Tremblay;M. Krumpe;T. Urrutia;S. Baum;G. Busch;F. Combes;S. Croom;T. Davis;A. Eckart;C. O’Dea;M. Pérez-Torres;J. Scharwächter;I. Smirnova-Pinchukova;C. M. Urry
目标。我们从近距离AGN参考调查（CARS）中探测了两个附近发光的无遮挡（1型）AGN的辐射效率，热风反馈模式，它们显示出与VLT-MUSE绘制的扩展[O III]电离气体有趣的kpc尺度弧状特征。我们的目标是探测热气泡，这将表明我们的目标，HE 0227-0931和HE 0351+0240中存在强大的星系尺度的流出，来自于钱德拉的深层（200 ks）观测。方法。通过测量扩展x射线发射的空间和光谱特性，并与亚kpc尺度的IFU数据进行比较，我们能够约束反馈场景，并直接测试电离气体是否是由激波风引起的。结果。在kpc尺度上没有检测到扩展的热气体排放。除非环境介质密度很低（100pc时n H ~ 1 cm−3），否则推断出的扩展x射线亮度上限远低于匹配AGN亮度的理论模型所期望的上限。结论。我们得出结论，kpc尺度上的高电离气体结构不是由两个目标的热流出而膨胀的，而是由不同来源的预先存在的气流的光电离引起的。我们的未探测结果表明，agn驱动的风的扩展x射线发射并不普遍，并且可能导致与当前理论预测的冲突。
Aims. We probe the radiatively-efficient, hot wind feedback mode in two nearby luminous unobscured (type 1) AGN from the Close AGN Reference Survey (CARS), which show intriguing kpc-scale arc-like features of extended [O III]ionized gas as mapped with VLT-MUSE. We aimed to detect hot gas bubbles that would indicate the existence of powerful, galaxy-scale outflows in our targets, HE 0227–0931 and HE 0351+0240, from deep (200 ks) Chandra observations. Methods. By measuring the spatial and spectral properties of the extended X-ray emission and comparing with the sub kpc-scale IFU data, we are able to constrain feedback scenarios and directly test if the ionized gas is due to a shocked wind. Results. No extended hot gas emission on kpc-scales was detected. Unless the ambient medium density is low (n H ∼ 1 cm−3 at 100 pc), the inferred upper limits on the extended X-ray luminosities are well below what is expected from theoretical models at matching AGN luminosities. Conclusions. We conclude that the highly-ionized gas structures on kpc scales are not inflated by a hot outflow in either target, and instead are likely caused by photoionization of pre-existing gas streams of different origins. Our nondetections suggest that extended X-ray emission from an AGN-driven wind is not universal, and may lead to conflicts with current theoretical predictions.