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arXiv 1208.4608astro-ph.GA
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银河系中面的一个80 pc长的大质量分子丝

An 80 pc Long Massive Molecular Filament in the Galactic Mid-Plane

Cara Battersby, John Bally

摘要:

纤维在恒星形成区域的普遍性在一系列尺度上是清楚的,但它们在恒星形成过程中的作用仍然存在疑问。我们认为,有不同类别的灯丝,负责他们观察到的多样性,在恒星形成的地区。本文给出了一个在银河系中平面上的大质量分子细丝的例子,它形成于紫外光驱动的气泡的交叉处,在80 pc以上显示出相干速度结构(<4km/s)。我们将此类来源归类为大分子纤维(MMFS; M > 10^4 Msun,长度> 10 pc,速度梯度< 5 km/s),并认为MMFS只是当今文献中讨论的许多不同类型的纤维之一。许多巨磁层与银河平面对齐,可能类似于在大设计螺旋中看到的黑暗尘埃带。

英文摘要:

The ubiquity of filaments in star forming regions on a range of scales is clear, yet their role in the star formation process remains in question. We suggest that there are distinct classes of filaments which are responsible for their observed diversity in star-forming regions. An example of a massive molecular filament in the Galactic mid-plane formed at the intersection of UV-driven bubbles which displays a coherent velocity structure (< 4 km/s) over 80 pc is presented. We classify such sources as Massive Molecular Filaments (MMFs; M > 10^4 Msun, length > 10 pc, velocity gradient < 5 km/s) and suggest that MMFs are just one of the many different classes of filaments discussed in the literature today. Many MMFs are aligned with the Galactic Plane and may be akin to the dark dust lanes seen in Grand Design Spirals.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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