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arXiv 1602.07702astro-ph.GA
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背景中的银河系:结构、运动学和综合性质

The Galaxy in Context: Structural, Kinematic and Integrated Properties

Joss Bland-Hawthorn, Ortwin Gerhard

摘要:

我们的银河系是理解盘状星系的基准。它是唯一一个可以利用从白矮星到超巨星的完整恒星分布来研究其形成历史的星系。最古老的组成部分为我们提供了独特的见解,了解星系如何形成和演变数十亿年。银河系是一个明亮的(L星)棒旋星系,中央有一个盒子状的凸起,一个主导盘,和一个弥漫的恒星晕。根据整体性质,它落在星系颜色-星等图中人口稀少的“绿谷”区域。在这里,我们回顾了银河系的关键综合、结构和运动学参数,并指出了不确定性以及未来进展的方向。银河系的研究将继续发挥重要作用,直到遥远的未来,因为有一些测量只能在近场进行,当代天体物理学的大部分依赖于这样的观测。

英文摘要:

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 white 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-star) 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 colour-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.

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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