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arXiv 0906.0765astro-ph.GA
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银河系中心几秒差距的质量分布

Mass Distribution in the Central Few Parsecs of Our Galaxy

Seungkyung Oh, Sungsoo S. Kim, Donald F. Figer

摘要:

通过对银河系中心动态弛豫恒星星族的红外测光和速度观测的分析,估计了银河系中心10 pc区域的封闭质量分布。档案中的HST/NICMOS和Gemini自适应光学图像用于获得数密度分布,自行和径向速度数据从文献中编译,以找到假设球对称和速度各向同性的速度色散分布。从这些数据中,我们计算封闭的质量和密度分布在中央10 pc的银河系使用的牛仔裤方程。改进后的估计能更好地描述分子云和星团落向银河系中心的演化过程,并约束了银河系内部恒星的形成历史。

英文摘要:

We estimate the enclosed mass profile in the central 10 pc of the Milky Way by analyzing the infrared photometry and the velocity observations of dynamically relaxed stellar population in the Galactic center. HST/NICMOS and Gemini Adaptive Optics images in the archive are used to obtain the number density profile, and proper motion and radial velocity data were compiled from the literature to find the velocity dispersion profile assuming a spherical symmetry and velocity isotropy. From these data, we calculate the enclosed mass and density profiles in the central 10 pc of the Galaxy using the Jeans equation. Our improved estimates can better describe the exact evolution of the molecular clouds and star clusters falling down to the Galactic center, and constrain the star formation history of the inner part of the Galaxy.

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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