TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. IV. G35.20−0.74 AND G35.20−1.74
TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. IV. G35.20−0.74 AND G35.20−1.74
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DOI：
10.1088/0004-637x/693/1/419
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发表时间：
2008-11
期刊：
影响因子：
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通讯作者：
Bo Zhang;Bo Zhang;X. Zheng;M. Reid;K. Menten;Ye Xu;Ye Xu;L. Moscadelli;A. Brunthaler
中科院分区：
文献类型：
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作者：
Bo Zhang;Bo Zhang;X. Zheng;M. Reid;K. Menten;Ye Xu;Ye Xu;L. Moscadelli;A. Brunthaler
我们报告了高质量恒星形成区G35.20−0.74和G35.20−1.74的三角视差，分别对应于2.19+0.24−0.20 kpc和3.27+0.56−0.42 kpc的距离。到两个源的距离接近于它们的近运动学距离，并将它们置于船底座-人马座螺旋臂中。将距离和自行与观测到的径向速度结合起来，给出了恒星形成区的位置和全空间运动。假设银河系的标准模型，G35.20−0.74和G35.20−1.74有着与银河系自转方向相反的奇特运动，分别为0.13 km s−1和0.16 km s−1，以及0.99 km s−1朝向银河系北极的运动。
We report trigonometric parallaxes for the high-mass star-forming regions G35.20−0.74 and G35.20−1.74, corresponding to distances of 2.19+0.24−0.20 kpc and 3.27+0.56−0.42 kpc, respectively. The distances to both sources are close to their near kinematic distances and place them in the Carina–Sagittarius spiral arm. Combining the distances and proper motions with observed radial velocities gives the locations and full space motions of the star-forming regions. Assuming a standard model of the Galaxy, G35.20−0.74 and G35.20−1.74 have peculiar motions of ≈13 km s−1 and ≈16 km s−1 counter to Galactic rotation and ≈9 km s−1 toward the North Galactic Pole.