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arXiv 0904.0131astro-ph.EPastro-ph.IM
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行星系形成与演化的研究

Investigations of the Formation and Evolution of Planetary Systems

Alwyn Wootten, Bryan Butler, Antonio Hales, Stuartt Corder, Robert Brown, David Wilner

摘要:

恒星和行星是宇宙的基本物体。它们的形成过程虽然相关,但可能在重要方面有所不同。几乎可以肯定,恒星是由引力坍缩形成的,而且很可能从第一颗恒星照亮天空开始就以这种方式形成了。虽然行星也有可能以这种方式形成,但涉及拱星盘吸积的过程一直受到青睐。高保真高分辨率图像可以解决这个问题;这两个过程都可能发生在某些质量范围内。未来十年需要回答的问题包括:行星是通过什么过程形成的,形成的方式如何决定行星系的性质?行星的质量分布是怎样的?母星的金属丰度以何种方式影响其行星系的性质?本文讨论了行星系从诞生到成熟的观测,着重讨论了100 $μ$ m以下的观测,这些观测可以阐明行星系统形成和演化的特征。这个光谱区的优点包括较低的不透明度,极高的分辨率,以达到行星形成的规模和执行精确的天体测量和高灵敏度的热发射。

英文摘要:

Stars and planets are the fundamental objects of the Universe. Their formation processes, though related, may differ in important ways. Stars almost certainly form from gravitational collapse and probably have formed this way since the first stars lit the skies. Although it is possible that planets form in this way also, processes involving accretion in a circumstellar disk have been favored. High fidelity high resolution images may resolve the question; both processes may occur in some mass ranges. The questions to be answered in the next decade include: By what process do planets form, and how does the mode of formation determine the character of planetary systems? What is the distribution of masses of planets? In what manner does the metallicity of the parent star influence the character of its planetary system? In this paper we discuss the observations of planetary systems from birth to maturity, with an emphasis on observations longward of 100 $μ$m which may illuminate the character of their formation and evolution. Advantages of this spectral region include lower opacity, availability of extremely high resolution to reach planet formation scales and to perform precision astrometry and high sensitivity to thermal emission.

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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