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arXiv 0901.1113astro-ph.GA
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在Milky Way棒中核尘埃带和尘埃带冲击的多重性

Multiplicity of nuclear dust lanes and dust lane shocks in the Milky Way bar

H. S. Liszt

摘要:

目的:我们发现存在一个小家庭的内部星系的尘埃带和尘埃带常设激波超出了两个主要的,以前已知存在的方法:我们分析图像的CO排放在内部地区的星系结果:在l > 0度的其他几个不同的例子中,主要尘埃带特征的独特运动学重复出现,在一种情况下,在星系团2的上端,在银河赤道上方100秒差距的相反位置,l > 3度。像以前已知的尘埃带一样,这些新的例子也与局部的,特别宽的线轮廓有关,被认为是在尘埃带冲击中中性气体破碎的特征。结论:在银河系球丘可能存在次级尘埃带和驻波。垂直结构提供了一个时间序列,了解长期演变的气流在酒吧。

英文摘要:

Aims: We show the existence of a small family of inner-galaxy dust lanes and dust lane standing shocks beyond the two major ones that were previously known to exist Methods: We analyze images of CO emission in the inner regions of the Galaxy Results: The peculiar kinematics of the major dust lane features are repeated in several other distinct instances at l > 0deg, in one case at a contrary location 100 pc above the galactic equator at l > 3degr at the upper extremity of Clump 2. Like the previously-known dust lanes, these new examples are alsoassociated with localized, exceptionally broad line profiles believed to be characteristic of the shredding of neutral gas at the standing dust lane shocks. Conclusions: There may be secondary dust lane and standing shocks in the Milky Way bulge. The vertical structure provides a temporal sequence for understanding the secular evolution of gas flow in the bar.

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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