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arXiv 1202.5892astro-ph.GA
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3-银河系隆起低前景消光窗口中的维度动力学:6个隆起场的径向速度

3-Dimensional Kinematics in low foreground extinction windows of the Galactic Bulge: Radial Velocities for 6 bulge fields

M. Soto, K. Kuijken, R. M. Rich

摘要:

银河系隆起的详细结构仍然不确定。在银河核球中观测恒星的困难阻碍了对银河系内部kpc的运动学表示的获取。在几个低前景消光窗口中观察三维运动学可以解决这个问题。我们已经开发出一种新的技术,它结合了精确的恒星HST的位置和自行积分场光谱,以获得可靠的3-D恒星运动学拥挤的领域的银河系中心。此外,我们目前的结果使用新技术在我们的项目中的六个领域。一个显着的顶点偏差已被发现在某些领域与以前的测定。这一结果证实了在银河系核球中存在一个恒星棒。

英文摘要:

The detailed structure of the Galactic bulge still remain uncertain. The strong difficulties of obtaining observations of stars in the Galactic bulge have hindered the acquisition of a kinematic representation for the inner kpc of the Milky Way. The observation of the 3-d kinematics in several low foreground extinction windows can solve this problem. We have developed a new technique, which combines precise stellar HST positions and proper motions with integral field spectroscopy, in order to obtain reliable 3-d stellar kinematics in crowded fields of the Galactic center. In addition, we present results using the new techniques for six fields in our project. A significant vertex deviation has been found in some of the fields in agreement with previous determinations. This result confirms the presence of a stellar bar in the Galactic bulge.

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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