论文标题
附近的Seyfert 2星系的空间分辨BPT映射
Spatially resolved BPT mapping of nearby Seyfert 2 galaxies
论文作者
论文摘要
我们使用HST窄带滤波器成像，介绍了附近七个Seyfert 2星系的延伸窄线区域（ENLRS）的空间分辨BPT映射。我们使用$ \ leq $ 0.1“ [O III] $λ$ 5007，H $α$，[S II] $λ$λ$λ$ 6717,6731和H $β$的分辨率排放线图像构建BPT图。电离锥由Seyfert型发射支配，可以将其主要由活跃的银河系核（AGN）解释为光电，并将电离锥过渡到衬里cocoon，并由uniie calansiie the uniie caliie cococoon延伸到ubique cococon cococon cocoon。环形区域不一定是seyfert型，衬里活性在Seyfert 2星系中起重要作用。
We present spatially resolved BPT mapping of the extended narrow line regions (ENLRs) of seven nearby Seyfert 2 galaxies, using HST narrow band filter imaging. We construct the BPT diagrams using $\leq$ 0.1" resolution emission line images of [O III]$λ$5007, H$α$, [S II]$λ$$λ$6717,6731, and H$β$. By mapping these diagnostic lines according to the BPT classification, we dissect the ENLR into Seyfert, LINER, and star-forming regions. The nucleus and ionization cones are dominated by Seyfert-type emission, which can be interpreted as predominantly photoionization by the active galactic nucleus (AGN). The Seyfert nucleus and ionization cones transition to and are surrounded by a LINER cocoon, extending up to $\sim$ 250 pc in thickness. The ubiquity of the LINER cocoon in Seyfert 2 galaxies suggests that the circumnuclear regions are not necessarily Seyfert-type, and LINER activity plays an important role in Seyfert 2 galaxies. We demonstrate that spatially resolved diagnostics are crucial to understanding the excitation mechanisms in different regions and the AGN-host galaxy interactions.
