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arXiv 1407.1609astro-ph.GA
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英仙座旋臂恒星形成区的三角视差

Trigonometric Parallaxes of Star Forming Regions in the Perseus Spiral Arm

Y. K. Choi, K. Hachisuka, M. J. Reid, Y. Xu, A. Brunthaler, K. M. Menten, T. M. Dame

摘要:

我们报告的三角函数的松弛和自行车的水脉泽的12个大规模的恒星形成地区的英仙座螺旋臂的银河系的酒吧和螺旋结构遗产(BeSSeL)调查的一部分。结合我们的结果与文献中的14个视差测量,我们估计英仙座臂的一部分的俯仰角为9.9 +/- 1.5度。这些源的三维银河系特有的运动表明,平均而言,他们正在向银河系中心移动,比银河系旋转慢。

英文摘要:

We report trigonometric parallaxes and proper motions of water masers for 12 massive star forming regions in the Perseus spiral arm of the Milky Way as part of the Bar and Spiral Structure Legacy (BeSSeL) Survey. Combining our results with 14 parallax measurements in the literature, we estimate a pitch angle of 9.9 +/- 1.5 degrees for a section of the Perseus arm. The three-dimensional Galactic peculiar motions of these sources indicate that on average they are moving toward the Galactic center and slower than the Galactic rotation.

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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