The radio nucleus of NGC 4151 at 5 and 8 GHz
The radio nucleus of NGC 4151 at 5 and 8 GHz
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DOI：
10.1093/mnras/263.2.471
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发表时间：
1993-07
影响因子：
4.8
通讯作者：
A. Pedlar;M. Kukula;D. Longley;T. Muxlow;D. Axon;S. Baum;C. O’Dea;S. W. Unger
中科院分区：
文献类型：
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作者：
A. Pedlar;M. Kukula;D. Longley;T. Muxlow;D. Axon;S. Baum;C. O’Dea;S. W. Unger
我们提出了5-和8-GHz的观测NGC 4151的塞弗特核。观测的角分辨率范围为400至50 mas，灵敏度高达7 μJy beam −1。我们确认了沿PA 77°的双侧射电喷流沿着的图像，并且还检测到向东6角秒（400秒差距）的弱分量，这表明与喷流相关的准直喷出物延伸的距离至少是早期测量所揭示的两倍。射流中的中心结具有比外部部件中的部件显著更高的压力。源中的大多数分量都有陡峭的光谱，尽管中心双星中的东部分量相对平坦（α =-0.3），这与它与光学连续核有关
We present 5- and 8-GHz observations of the Seyfert nucleus of NGC 4151. The observations have angular resolutions ranging from 400 to 50 mas and sensitivities as high as 7 μJy beam −1 . We confirm the picture of a two-sided radio jet along PA 77°, and also detect a weak component 6 arcsec (400 pc) to the east which shows that collimated ejecta associated with the jet extend at least twice as far as revealed by earlier measurements. The central knots in the jet have significantly higher pressure than components in the outer parts. Most of the components in the source have steep spectra, although that of the eastern component in the central double is relatively flat (α = −0.3), consistent with it being associated with the optical continuum nucleus