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The Galaxy in Context: Structural, Kinematic, and Integrated Properties
Annual Review of Astronomy and Astrophysics ( IF 33.3 ) Pub Date : 2016-09-19 , DOI: 10.1146/annurev-astro-081915-023441
Joss Bland-Hawthorn 1 , Ortwin Gerhard 2
Affiliation  

Our Galaxy, the Milky Way, is a benchmark for understanding disk galaxies. It is the only galaxy whose formation history can be studied using the full distribution of stars from faint dwarfs to supergiants. The oldest components provide us with unique insight into how galaxies form and evolve over billions of years. The Galaxy is a luminous (L⋆) barred spiral with a central box/peanut bulge, a dominant disk, and a diffuse stellar halo. Based on global properties, it falls in the sparsely populated “green valley” region of the galaxy color-magnitude diagram. Here we review the key integrated, structural and kinematic parameters of the Galaxy, and point to uncertainties as well as directions for future progress. Galactic studies will continue to play a fundamental role far into the future because there are measurements that can only be made in the near field and much of contemporary astrophysics depends on such observations.

中文翻译:

背景中的星系:结构、运动和综合属性

我们的银河系银河系是理解盘状星系的基准。它是唯一一个可以使用从暗矮星到超巨星的完整恒星分布来研究其形成历史的星系。最古老的组件为我们提供了关于星系如何形成和演化数十亿年的独特见解。银河系是一个明亮的 (L⋆) 棒状旋涡,中央有一个盒子/花生凸起,一个占主导地位的圆盘和一个漫射的恒星晕。根据全局特性,它位于星系色等图中人烟稀少的“绿谷”区域。在这里,我们回顾了银河系的关键综合参数、结构参数和运动学参数,并指出了不确定性以及未来进展的方向。
更新日期:2016-09-19
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