TRIGONOMETRIC PARALLAXES OF STAR FORMING REGIONS IN THE PERSEUS SPIRAL ARM
TRIGONOMETRIC PARALLAXES OF STAR FORMING REGIONS IN THE PERSEUS SPIRAL ARM
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DOI：
10.1088/0004-637x/790/2/99
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
Y. Choi;Y. Choi;K. Hachisuka;M. Reid;Y. Xu;A. Brunthaler;K. Menten;T. Dame
中科院分区：
文献类型：
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作者：
Y. Choi;Y. Choi;K. Hachisuka;M. Reid;Y. Xu;A. Brunthaler;K. Menten;T. Dame
我们报告的12个大规模的星星形成区域的银河系的酒吧和螺旋结构遗产（贝塞尔）调查的一部分，三角形的反射和自行的水脉泽。结合文献中的14个视差测量结果，我们估计英仙座臂的一个截面的俯仰角为9.°9 ± 1.°5.这些源的三维银河系特有运动表明，它们平均向银河系中心运动，速度比银河系自转慢.
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 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.