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QSO2 outflow characterization using data obtained with OSIRIS at the Gran Telescopio Canarias

机译：使用Gran Telescopio Canarias的OSIRIS获得的数据对QSO2流出进行表征

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Context . Ionized outflows are ubiquitous in non-radio-loud obscured quasars (QSO2s) at different redshifts. However, the actual size of the outflows and their efficiency for gas ejection and star formation truncation are controversial. Large-scale (exceeding several kiloparsec) extended radio structures might be necessary to identify (even to trigger) outflow signatures across such large spatial scales. Aims . We search for large-scale ionized outflows associated with six optically selected QSO2 (five non-radio-loud and one radio-loud) at z ?～?0.2?0.5, targeting objects with extended radio structures. We also investigate the dynamical state of the QSO2 host galaxies. Methods . We obtained data with the optical imager and long-slit spectrograph (OSIRIS) mounted on the 10.4m Gran Telescopio Canarias Spanish telescope (GTC) for these six QSO2 with the slit located along the radio axis. We traced the gas kinematics with the [OIII] λ λ 4959,5007 lines to investigate ionized outflows and characterize the dynamical state of the host galaxies. This second study was complemented with previously published spectroscopic data obtained with the multimode focal reducer and low dispersion spectrograph (FORS2) mounted on the Very Large Telescope (VLT) of 13 more QSO2 at similar z . Results . We identify ionized outflows in four out of the six QSO2 observed with the GTC. The outflows are spatially unresolved in two QSO2 and compact in a third (radial size of R ?=?0.8?±?0.3 kpc). Of particular interest is the radio-quiet QSO2 SDSS 0741+3020 at z ?=?0.47. It is associated with a giant ～112 kpc nebula. An ionized outflow probably induced by the radio structures has been detected along the axis defined by the central ～1″ radio structure, extending up to at least ～4 kpc from the active galactic nucleus (AGN). Turbulent gas ( σ ?～?130 km s~(?1)) has also been detected across the giant gas nebula up to ～40 kpc from the AGN. This turbulence may have been induced by outflows triggered by the interaction between a so-far undetected large-scale radio source and the nebula. Regarding the dynamical state of the host galaxies, we find that the majority of the QSO2 show v / σ ?< ?1, implying that they are dominated by random motions (so-called dispersion-dominated systems). Most (17 of 19) fall in the area of the E/S0 galaxies in the dynamical diagram v / σ versus σ . None are consistent with spiral or disk galaxies.
机译：语境。电离流出在不同的红移情况下普遍存在于非无线电响模糊类星体（QSO2）中。但是，实际流出量及其对气体喷射和恒星形成截断的效率是有争议的。大规模（超过几千帕秒）扩展的无线电结构可能是必要的，以识别（甚至触发）如此大的空间尺度上的流出信号。目的。我们搜索与六个光学选择的QSO2（五个非无线电波大声和一个无线电波大声）在z？〜？0.2？0.5关联的大规模电离流出，目标是具有扩展无线电结构的物体。我们还研究了QSO2宿主星系的动力学状态。方法 。我们使用安装在10.4m Gran Telescopio Canarias西班牙望远镜（GTC）上的光学成像仪和长缝光谱仪（OSIRIS）获得了这六个QSO2的数据，其狭缝沿无线电轴。我们用[OIII]λλ4959,5007线追踪了气体运动学，以研究电离流出并表征宿主星系的动力学状态。这项第二项研究得到了先前发布的光谱数据的补充，该数据是通过多模聚焦减少器和低色散光谱仪（FORS2）安装在具有13个类似Q的QSO2的甚大望远镜（VLT）上的。结果。我们在使用GTC观察到的六个QSO2中确定了四个中的离子流出。流出的空间在两个QSO2中无法解析，并在第三个QSO2中压缩（径向尺寸R？=？0.8？±？0.3 kpc）。尤其令人关注的是z≥0.47的安静的QSO 2 SDSS 0741 + 3020。它与一个〜112 kpc的巨大星云有关。已经沿着中央〜1″无线电结构所定义的轴检测到了可能由无线电结构引起的电离流出，从活动银河核（AGN）延伸到至少〜4 kpc。在距AGN约40 kpc的巨大气体星云中也检测到了湍流气体（σ？〜？130 km s〜（？1））。这种湍流可能是由迄今未发现的大规模无线电源与星云之间的相互作用触发的外流引起的。关于宿主星系的动力学状态，我们发现大多数QSO2显示v /σ？<？1，这意味着它们由随机运动控制（所谓的色散控制系统）。在动力学图v /σ与σ中，大多数（19之17）属于E / S0星系区域。没有一个与旋涡星系或盘状星系一致。

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