NGC 4254: A Spiral Galaxy with an M = 1 Mode and Infalling Gas
NGC 4254: A Spiral Galaxy with an M = 1 Mode and Infalling Gas
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NGC 4254：具有 M = 1 模式和坠落气体的螺旋星系
DOI：
10.1086/173375
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
L. Mundy
中科院分区：
文献类型：
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作者：
B. Phookun;S. Vogel;L. Mundy
本文介绍了螺旋星系NGC 4254的高分辨率H I和Hα观测结果。这些观测分别是用VLA和Maryland-Caltech Fabry-Perot相机获得的。NGC 4254是不寻常的，它有一个巨大的螺旋结构，有一个很强的m=1的成分，在光学图像中没有明显的原因。我们的观测结果表明，除了通常的银盘成分外，还有叠加在H I盘上和之外的H I云，其速度可达150 km s-1。这些云的质量为102.3 × 108 M ○。，它们可能是被NGC 4254潮汐破坏的实体的残余，现在正在与它合并
We present high-resolution H I and Hα observations of the spiral galaxy NGC 4254. The observations were obtained with the VLA and the Maryland-Caltech Fabry-Perot camera, respectively. NGC 4254 is unusual in having a grand-design spiral structure with a strong m=1 component for which there is no obvious cause in optical images. Our observations reveal that, in addition to the usual galactic disk component, there are H I clouds superposed on and beyond the H I disk, at velocities up to 150 km s −1 from those established for the disk. The mass in these clouds is ∼2.3×10 8 M ○. , and they may be the remnants of an entity that was tidally disrupted by NGC 4254 and is now merging with it