The opacity of spiral disks
The opacity of spiral disks
复制标题
螺旋盘的不透明度
DOI：
10.1086/186639
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
E. Athanassoula
中科院分区：
文献类型：
--
作者：
A. Bosma;Y. Byun;K. Freeman;E. Athanassoula
螺旋星系盘的不透明度可以通过研究几个波长区域的边缘星系中的气体成分来评估。通过结合星系NGC 891在21厘米（H I）、2.6毫米（CO）和Hα处的数据，我们发现外部区域是透明的，而内部区域（在检测到CO的半径范围内）可能是光学厚度的。对于小星系 NGC 100，这些数据表明该星系总体上是透明的，尽管光学图像中存在尘埃斑块
The opacity of the disks of spiral galaxies can be evaluated by studying the gaseous component in edge-on galaxies in several wavelength regions. By combining data of the galaxy NGC 891 at 21 cm (H I), 2.6 mm (CO), and Hα, we show that the outer regions are transparent, while the inner regions, out to the radius to which CO is detected, could be optically thick. For the small galaxy NGC 100, such data indicate that this galaxy is by and large transparent, despite the presence of dust patches in the optical image