Gas structure and dynamics towards bipolar infrared bubble
Gas structure and dynamics towards bipolar infrared bubble
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双极红外气泡的气体结构和动力学
DOI：
10.1007/s10509-017-3153-5
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发表时间：
2017
影响因子：
1.9
通讯作者：
Xiao-Lan Liu
中科院分区：
文献类型：
--
作者：
Jin-Long Xu;Naiping Yu;Chuan-Peng Zhang;Xiao-Lan Liu
我们提出了四个双极气泡（G045.386-0.726，G049.998-0.125，G050.489+0.993和G051.610-0.357）的多波长分析，以探测其周围气体的结构和动力学。12 CO、13 CO和C18 O的观测是用紫金山天文台（PMO）13.7米射电望远镜进行的。对于四个双极泡，明亮的8.0 μm发射显示了双极结构。每个双极泡与HII区域相关联。从CO观测中我们发现，G045.386-0.726是由两个不同距离的气泡组成的，而不是一个双极气泡。G049.998-0.125和G051.610-0.357中的每一个与细丝相关联。CO发射中的丝状体将G049.998-0.125和G051.610-0.357分成两个叶。我们认为G049.998-0.125和G051.610-0.357这两颗令人兴奋的恒星都形成了片状结构云。此外，G050.489+0.993与团块相关联，其显示出三角形状形状，具有朝向G050.489+0.993的两个叶的陡峭的积分强度梯度。我们认为G050.489+0.993的两个叶同时扩张成丛。
We present multi-wavelength analysis for four bipolar bubbles (G045.386-0.726, G049.998-0.125, G050.489+0.993, and G051.610-0.357) to probe the structure and dynamics of their surrounding gas. The12CO,13COand C18Oobservations are made with the Purple Mountain Observation (PMO) 13.7 m radio telescope. For the four bipolar bubbles, the bright 8.0 μm emission shows the bipolar structure. Each bipolar bubble is associated with an Hiiregion. From CO observations we find that G045.386-0.726 is composed of two bubbles with different distances, not a bipolar bubble. Each of G049.998-0.125 and G051.610-0.357 is associated with a filament. The filaments in CO emission divide G049.998-0.125 and G051.610-0.357 into two lobes. We suggest that the exciting stars of both G049.998-0.125 and G051.610-0.357 form in a sheet-like structure clouds. Furthermore, G050.489+0.993 is associated with a clump, which shows a triangle-like shape with a steep integrated intensity gradient towards the two lobes of G050.489+0.993. We suggest that the two lobes of G050.489+0.993 have simultaneously expanded into the clump.