论文标题
银河中心叶的西部真正位于哪里？
Where is the Western Part of the Galactic Center Lobe Located really?
论文作者
论文摘要
银河中心叶（GCL）是一个奇特的物体，从银河平面向正河流纬度广泛突出，在无线电观察的早期，该物体已朝向银河中心（GC）发现。奇特的形状暗示了与历史事件，星际爆发，大爆炸等任何关系。但是，GCL是否是位于GC区域中的单个大型结构的问题尚未确定。在先前的观察结果中，在GCL的西部（WPGCL）中发现了针对低频发射的轮廓，这表明该部分位于GC区域的前面。另一方面，发现无线电重组线的LSR速度低至0 kms $^{ - 1} $。但是，这些观察结果无法确定视线线上的确切位置。它还有另一种可能性是它位于GC区域的近侧。在此分析中，我们将这些结果与视觉灭绝图朝GC进行了比较。我们发现，视觉消光的分布大于4 mag。显然，对应于WPGCL的轮廓。 WPGCL最多必须位于我们的几个KPC之内，而不是GC区域。这将是银河磁盘中的巨型HII区域。
The Galactic Center Lobe (GCL) is a peculiar object widely protruding from the Galactic plane toward the positive Galactic latitude, which had been found toward the Galactic Center (GC) in the early days of the radio observation. The peculiar shape has suggested any relation with historical events, star burst, large explosion and so on in the GC. However, the issue whether the GCL is a single large structure located in the GC region is not yet settled conclusively. In the previous observations, the silhouette against the low frequency emission was found in the western part of the GCL (WPGCL), This suggests that the part is located in front of the GC region. On the other hand, the LSR velocity of the radio recombination line toward it was found to be as low as 0 kms$^{-1}$. However, these observations cannot determine the exact position on the line-of-sight. There is still another possibility that it is in the near side area of the GC region. In this analysis, we compare these results with the visual extinction map toward the GC. We found that the distribution of the visual extinction larger than 4 mag. clearly corresponds to the silhouette of the WPGCL. The WPGCL must be located at most within a few kpc from us and not in the GC region. This would be a giant HII region in the Galactic disk.
