年轻的Z形FR射电星系NGC 3801的多波长研究
A Multiwavelength Study of a Young, Z-shaped, FR I Radio Galaxy NGC 3801
摘要：
我们目前的初步结果，从合并的候选人，NGC3801，托管一个年轻的FR I射电星系，Z形结构的多波长研究。通过分析VLA的档案数据，我们在宿主星系的两侧发现了两个HI发射斑点，这表明一个30 kpc大小的旋转气体盘与恒星旋转对齐，但旋转速度明显快于恒星。还可以看到与东叶周围的激波壳层有关的宽的、微弱的、蓝移的吸收翼和HI吸收团，这可能是由于喷流驱动的外流。虽然8.0微米的尘埃和PAH发射，从斯皮策和近和远紫外发射的GALEX被认为是在一个大规模的S形，部分符合HI发射斑点，它揭示了一个半径约2千秒差距的环状，尘埃，恒星形成结构的核区域，垂直于无线电喷流轴。它与运动学解耦的核心星系的相似性和其他证据一直被认为是这个年轻的弯曲喷流射电星系的合并起源。
英文摘要：
We present preliminary results from a multi-wavelength study of a merger candidate, NGC3801, hosting a young FR I radio galaxy, with a Z-shaped structure. Analysing archival data from the VLA, we find two HI emission blobs on either side of the host galaxy, suggesting a 30 kpc sized rotating gas disk aligned with stellar rotation, but rotating significantly faster than the stars. Broad, faint, blue-shifted absorption wing and an HI absorption clump associated with the shocked shell around the eastern lobe are also seen, possibly due to an jet-driven outflow. While 8.0 um dust and PAH emission, from Spitzer and near and far UV emission from GALEX is seen on a large scale in an S-shape, partially coinciding with the HI emission blobs, it reveals a ~2 kpc radius ring-like, dusty, starforming structure in the nuclear region, orthogonal to the radio jet axis. Its similarities with Kinematically Decoupled Core galaxies and other evidences have been argued for a merger origin of this young, bent jet radio galaxy.
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