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arXiv 1905.02018astro-ph.GA
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CO向W3/4/5复合体I流出的候选者:样品及其空间分布

CO Outflow Candidates Toward the W3/4/5 Complex I: The Sample and its Spatial Distribution

Yingjie Li, Ye Xu, Yan Sun, Qing-Zeng Yan, Yuehui Ma, Ji Yang

摘要:

利用紫金山天文台德令哈13.7 m望远镜,对W3/4/5杂岩体及其周围进行了大尺度$^{12}$ CO $\left(J=1 \rightarrow 0\right)$外流测量($\sim$ 110 deg $^2$)。总共确定了459名外流候选人。约62%(284)位于Perseus臂,包括W3/4/5复合体及其周围,而$\sim$ 35%(162)位于局部臂,$\sim$ 1%(5)位于外臂,$\sim$ 2%(8)位于两个臂间区域。这一结果表明,恒星的形成集中在银河系的旋臂中。外流候选者的详细空间分布表明,英仙座臂在研究区域中呈现出最活跃的恒星形成。W3/4/5复合体是研究触发环境下大质量恒星形成的重要区域。一个关键区域,这已被其他研究,是在东部高密度W3复杂的W 4复杂的邻居。两个壳状结构的本地手臂包含的候选人,可用于研究的影响,对恒星形成的大质量或中等质量的恒星在相对孤立系。两个臂间区域和外臂的大多数外流候选者位于冠状结构中。

英文摘要:

Using the Purple Mountain Observatory Delingha 13.7 m telescope, we conducted a large-scale $^{12}$CO $\left(J=1 \rightarrow 0\right)$ outflow survey (over $\sim$ 110 deg$^2$) toward the W3/4/5 complex and its surroundings. In total, 459 outflow candidates were identified. Approximately 62\% (284) were located in the Perseus arm, including W3/4/5 complex and its surroundings, while $\sim$ 35\% (162) were located in the Local arm, $\sim$ 1\% (5) in the Outer arm, and $\sim$ 2\% (8) in two interarm regions. This result indicated that star formation was concentrated in the Galactic spiral arms. The detailed spatial distribution of the outflow candidates showed that the Perseus arm presented the most active star formation among the study regions. The W3/4/5 complex is a great region to research massive star formation in a triggered environment. A key region, which has been well-studied by other researches, is in the eastern high-density W3 complex that neighbors the W4 complex. Two shell-like structures in the Local arm contain candidates that can be used to study the impact on star formation imposed by massive or intermediate-mass stars in relatively isolated systems. The majority of outflow candidates in the two interarm regions and the Outer arm are located in filamentary structures.

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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