COSMOS中严重遮蔽活动星系核的SINFONI谱：z $\sim2.5$处MIR/O目标外流的证据
SINFONI spectra of heavily obscured AGNs in COSMOS: evidence of outflows in a MIR/O target at z$\sim2.5$
摘要：
本文介绍了用SINFONI VLT光谱仪在AO模式下观测到的四个候选的、z $\sim$ 1-2.5的暗康普顿厚（CT）类星体的新数据。这些来源是从24 $μ$米斯皮策MIPS宇宙场调查中选择的，以红色中红外到光学和光学到近红外颜色为基础，目的是识别尘埃笼罩环境中的活动星系核，其中大多数黑洞质量聚集在尘埃笼罩环境中。分析近红外光谱，以检查发射谱线特征并在[OIII]-H $β$和H $α$ -[NII]区域中寻找宽组分。X射线光谱分析，无线电和MIR诊断，和SED拟合也被用来研究源的性质。我们成功地确定了三个天体，我们只有一个光度红移估计。基于他们的发射线诊断和辅助多波长的限制，我们发现，所有四个目标港模糊活动星系核。仅在一个目标MIRO 20581中揭示了可归因于外流影响的广泛概况。特别是，我们清楚地解决了快速（$\sim$ 1600公里/秒）和扩展（$\sim$ 5千秒差距）流出的[OIII]5007发射线。这一特征是电离流出气体的常用指标，仅针对该目标进行采样和检测;因此，我们不能排除其他来源中存在流出。总的来说，我们从我们的目标和其他比较样本的文献中得到的约束表明，这些光学微弱的发光红外星系，主办模糊AGN，可能代表了一个简短的合并后的星爆和清晰的类星体阶段之间的演化阶段。
英文摘要：
We present new data for four candidate obscured Compton-Thick (CT) quasars at z $\sim$1-2.5 observed with SINFONI VLT spectrograph in AO mode. These sources were selected from a 24$μ$m Spitzer MIPS survey of the COSMOS field, on the basis of red mid-infrared-to-optical and optical-to-near-infrared colours, with the intention of identifying active galactic nuclei (AGNs) in dust enshrouded environments, where most of the black hole mass is assembled in dust enshrouded environments. Near infrared spectra were analyzed in order to check for emission line features and to search for broad components in the [OIII]-H$β$ and H$α$-[NII] regions. X-ray spectral analysis, radio and MIR diagnostics, and SED fitting have also been employed to study the nature of the sources. We successfully identified three objects for which we had only a photometric redshift estimate. Based on their emission line diagnostics and on ancillary multi-wavelength constraints, we find that all four targets harbor obscured AGNs. Broad profiles that could be attributed to the effects of outflows are revealed in only one target, MIRO20581. In particular, we clearly resolved a fast ($\sim$1600 km/s) and extended ($\sim$5 kpc) outflow in the [OIII]5007 emission line. This feature, the commonly used indicator for ionised outflowing gas, was sampled and detected only for this target; hence, we can not exclude the presence of outflows in the other sources. Overall, the constraints we obtain from our targets and from other comparative samples from the literature suggest that these optically faint luminous infrared galaxies, hosting obscured AGNs, may represent a brief evolutionary phase between the post-merger starburst and the unobscured QSO phases.
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