In the manuscript, we report evidence on broad [O iii] components apparently obscured in Type-2 active galactic nuclei (AGN) under the framework of the unified model, after checking properties of broad [O iii] emissions in large samples of Type-1 and Type-2 AGN in Sloan Digital Sky Survey DR12. We can well confirm the statistically lower flux ratios of the broad to the core [O iii] components in Type-2 AGN than in Type-1 AGN, which can be naturally explained by stronger obscured broad [O iii] components by central dust torus in Type-2 AGN, unless the unified model for AGN was not appropriate to the narrow emission lines. The results provide further evidence to support broad [O iii] components coming from emission regions nearer to central BHs, and also indicate the core [O iii] component as the better indicator for central activities in Type-2 AGN, due to few effects of obscuration on the core [O iii] component. Considering the broad [O iii] components as signs of central outflows, the results provide evidence for strong central outflows being preferentially obscured in Type-2 AGN. Furthermore, the obscured broad [O iii] component can be applied to explain the different flux ratios of [O iii]λ5007Å/H β between Type-1 and Type-2 AGN in the BPT diagram.

中文翻译：

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2 型 AGN 中模糊的广泛 [O iii] 组件的证据

在手稿中，我们报告了在统一模型框架下在 2 型活动星系核 (AGN) 中明显模糊的广泛 [O iii] 成分的证据，在检查了大型样本中的广泛 [O iii] 发射的性质-斯隆数字巡天 DR12 中的 1 和 2 型 AGN。我们可以很好地证实，在统计上，2 型 AGN 中宽与核心 [O iii] 分量的通量比低于 1 型 AGN，这可以通过中央尘埃环面更强的模糊宽 [O iii] 分量来解释在 2 型 AGN 中，除非 AGN 的统一模型不适用于窄发射线。结果提供了进一步的证据来支持来自更靠近中央 BH 的排放区域的广泛 [O iii] 分量，并且还表明核心 [O iii] 分量是 2 型 AGN 中中央活动的更好指标，由于遮蔽对核心 [O iii] 组件的影响很小。考虑到广泛的 [O iii] 成分作为中心流出的迹象，结果提供了强烈的中心流出在 2 型 AGN 中优先被掩盖的证据。此外，模糊的宽 [O iii] 分量可用于解释 BPT 图中 Type-1 和 Type-2 AGN 之间 [O iii]λ5007Å/H β 的不同通量比。