THE PARALLAX OF W43: A MASSIVE STAR-FORMING COMPLEX NEAR THE GALACTIC BAR
THE PARALLAX OF W43: A MASSIVE STAR-FORMING COMPLEX NEAR THE GALACTIC BAR
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DOI：
10.1088/0004-637x/781/2/89
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
B. Zhang;L. Moscadelli;M. Sato;M. Reid;K. Menten;X. Zheng;A. Brunthaler;T. Dame;Y. Xu;K. Immer
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文献类型：
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作者：
B. Zhang;L. Moscadelli;M. Sato;M. Reid;K. Menten;X. Zheng;A. Brunthaler;T. Dame;Y. Xu;K. Immer
我们报告三角视差测量的脉泽在大规模的恒星形成复杂的W43从甚长基线阵列观测的一部分，酒吧和螺旋结构的遗产调查。根据对W43的三个12 GHz甲醇脉泽源（G029.86−00.04、G029.95−00.01和G031.28+00.06）和一个22 GHz水脉泽源（G031.58+00.07）的测量，我们得出了W43到W43的距离为kpc。通过将脉泽与CO分子云相关联，并将云运动学与CO速度螺旋特征相关联，我们将W43分配给盾牌螺旋臂，靠近银河酒吧的近端。W43的特殊运动是向银心方向移动约20 km s−1，很可能是由棒的引力引起的。
We report trigonometric parallax measurements of masers in the massive star-forming complex W43 from Very Long Baseline Array observations as part of the Bar and Spiral Structure Legacy Survey. Based on measurements of three 12 GHz methanol maser sources (G029.86−00.04, G029.95−00.01, and G031.28+00.06) and one 22 GHz water maser source (G031.58+00.07) toward W43, we derived a distance of kpc to W43. By associating the masers with CO molecular clouds, and associating the clouds kinematically with CO longitude–velocity spiral features, we assign W43 to the Scutum spiral arm, close to the near end of the Galactic bar. The peculiar motion of W43 is about 20 km s−1 toward the Galactic Center and is very likely induced by the gravitational attraction of the bar.